10 Jan

Challenges and R&D Developments for the Electron Ion Collider

10 January 2025 - 3:00 PM
Online via Zoom
Brookhaven National Laboratory (BNL)

Qiong Wu

Show/Hide Abstract

Understanding how the properties of matter emerge from the constituents of quantum chromodynamics (QCD) is a central goal of nuclear physics and the primary motivation behind the Electron-Ion Collider (EIC). The EIC will enable groundbreaking investigations into how quarks, anti-quarks, and gluons contribute to the nucleon's spin—an enduring question that remains unresolved despite extensive global research. With its cutting-edge capabilities, the EIC is poised to unlock critical insights into the structure and origins of matter.

The EIC builds upon the existing Relativistic Heavy Ion Collider (RHIC) facility at Brookhaven National Laboratory, leveraging its infrastructure while incorporating innovative advancements in accelerator science and technology. Key upgrades include increasing the hadron beam current threefold, integrating a state-of-the-art electron storage ring (ESR) within the RHIC tunnel, and generating and maintaining highly polarized electron bunches from the source to the storage ring. These upgrades will enable the delivery of polarized electron beams of up to 18 GeV for collisions with polarized protons and heavy ions.

To push technical boundaries and prepare for the production stage, over 10 critical R&D initiatives have been undertaken across the EIC complex. These efforts not only form the foundation for the collider’s development but also serve as training platforms, advancing expertise in accelerator science and project management while fostering innovation.

20 Jan

Novel Designs and Photoemission Physics to Enhance Brightness of Radio Frequency Photoinjectors

20 January 2025 - 10:00 AM
2219 Engineering Building and Online via Zoom
FRIB Graduate Research Assistant

Benjamin Sims

Show/Hide Abstract
Advisor: Dr. Sergey Baryshev High-brightness injectors are key to improvements in UED, XFELs, and Laser Compton Back Scattering technologies as they increase their resolution, efficiency, and performance when used. Current advancements in cathode technologies and emittance compensation have provided substantial gains in brightness in recent years but additional approaches will be necessary to continue pushing to higher levels of brightness and resulting light source luminosity. This dissertation discusses novel practical approaches and designs that can be implemented on various accelerators to improve their brightness. Chapter 2 focused on Space charge emittance and RF emittance management exampled using a canonical injector. Chapter 3 discusses implementing cathode retraction for in-situ intrinsic emittance measurement with the goal of decreasing emittance as well as ensuring desired cathode performance. Chapter 4 explores a novel multimode cavity design that focuses on bunch compression to increase the current of the bunch and thus the brightness.
22 Jan

The Influence of Near-Threshold States on Nuclear Observables

22 January 2025 - 4:10 PM
1300 FRIB Laboratory and Online via Zoom
Argonne National Laboratory

Calem Hoffman

Show/Hide Abstract
One method of pursuit in our search for a more complete description of the spectroscopic properties of nuclei is through the isolation of specific or well-developed mechanisms. In the present work the characteristics of a weakly-bound nuclear single-particle orbital wave function, defined by its approach to the confining threshold, have been shown to be rooted within various nuclear phenomena. Most notably, the role of this geometric or so-called weak-binding behavior has been found to impact our descriptions of evolving single-particle orbitals, the presence or impact of 'bubble' nuclei, the locations of the particle driplines, and the origins of nuclear halo states. Future directions building upon and complementing this new insight will also be discussed.
24 Jan

Resonance Control for SRF Cavities

24 January 2025 - 3:00 PM
Online via Zoom
Fermi National Laboratory

Crispin Contreras-Martinez

Show/Hide Abstract
An SRF cavity is used to accelerate a beam of particles in a linac. In order to accelerate the beam efficiently and without interruptions the cavity must be tuned to the nominal frequency. During operation an SRF cavity experiences a wide variety of vibrations which perturb the cavity frequency. Many design efforts are implemented to mitigate the vibrations on the cavity and they result in a reduction. However, not all the vibrations can be eliminated and some while reduced are still present. In this talk a review of the vibration sources in LCLS-II and LCLS-II-HE cryomodules will be discussed. Cavity tuners are used to mitigate the vibrations that couldn’t be eliminated. The components of the tuner are discussed. Finally, a discussion on some resonance control algorithms will be done. Resonance control algorithms for both pulsed and continuous wave (CW) will be presented.
24 Jan

ASG Piano Concert: Echoes and Innovations performed by Jackson Hacias, Jonathan Hilliard, Kevin Eisenberg, and Chris Corey

24 January 2025 - 5:30 PM
1300 FRIB Laboratory
Show/Hide Abstract
Concert program: 1. Groovin high-John "Dizzy" Gilespie 2. Maroon-Jackson Hacias 3. I want to talk about you-Billy Eckstine 4. The night has a thousand eyes-Buddy Bernier/Jerry Brainin 5. In the pale glow of night-Jackson Hacias 6. Yes or no-Wayne Shorter 7. Galapagos-Jackson Hacias
26 Jan

Reimagining the Exploration of Fundamental Interactions with AI

26 January 2025 - 1:00 PM
Online via Zoom
Lawrence Berkeley National Laboratory

Benjamin Nachman

Show/Hide Abstract
Particle, nuclear, and astrophysics experiments are producing massive amounts of data to answer fundamental questions about the basic constituents of our universe. While researchers in these areas have been using advanced data science tools for decades, modern machine learning has introduced a paradigm shift whereby data can be directly analyzed holistically without first compressing it into a more manageable and human understandable format. How will the machines help us explore the unknown? Can they be trusted to give us the right answers? I’ll attempt to address these questions and others with a talk about the use of modern machine learning, including generative AI, in the study of fundamental interactions.
29 Jan

From Tensor Current Limits to Solar Neutrinos: 8Li and 8B Studies with the Beta-decay Paul Trap

29 January 2025 - 3:30 PM
1300 FRIB Laboratory
Lawrence Livermore National Laboratory

Brenden Longfellow

Show/Hide Abstract

The vector – axial vector form of the electroweak interaction was established through pioneering beta-decay experiments in the 1960s and incorporated into the standard model of particle physics. However, there is no a priori reason that the other currents, scalar and tensor, could not be present. The Gamow-Teller beta decays of 8Li and 8B have extremely large Q values and the daughter nucleus in both cases, 8Be, is alpha unbound making these systems exemplary probes of the presence of any tensor contribution affecting the beta-neutrino angular correlation. The improvements from over a decade of high-statistics experiments on 8Li and 8B performed at Argonne National Laboratory using the Beta-decay Paul Trap (BPT) will be presented. In these measurements, the energies of the alpha and beta particles were determined using four 32x32 double-sided silicon strip detectors surrounding the BPT to precisely reconstruct the decay kinematics. The latest iteration of experiments has set the two world-leading limits on tensor currents from single beta-decay measurements. The combined BPT limits from 8Li and 8B for tensor coupling to right-handed neutrinos are comparable to a recent global evaluation of all other precision beta decay studies and are consistent with the standard model, relieving some existing tension. In addition, the high-energy neutrinos observed in solar neutrino astrophysics experiments on Earth predominately originate from 8B beta decay in the Sun. Results on determining the 8B neutrino energy spectrum, an important input for the astrophysics community, from the same data set will be discussed.

31 Jan

Pulsating massive stars as finely tuned instruments in the stellar symphony

31 January 2025 - 2:00 PM
2025 FRIB Laboratory and Online via Zoom
Newcastle University, UK

Dominic Bowman

Show/Hide Abstract
Massive stars are important metal factories in the Universe because through their winds and explosive deaths as supernovae they provide radiative, kinematic, and chemical feedback to their surroundings. However, stellar evolution models currently contain large theoretical uncertainties for physical mechanisms at work in the deep interiors of massive stars. The uncertainties associated with rotation, chemical mixing, magnetic fields, and angular momentum transport propagate throughout stellar evolution making it difficult to accurately determine stellar masses and ages. The analysis of pulsation frequencies in massive stars allows one to break model degeneracies, uniquely probe stellar interiors, and constrain uncalibrated physical processes within our models. In this seminar, I discuss the recent advances in our understanding of massive stars by means of asteroseismology – the study of stellar pulsations. Modern space telescopes have revealed diverse variability mechanisms in massive stars across different evolutionary stages, which includes the main sequence through to blue supergiant stars. This provides us with the opportunity to perform a data-driven calibration of evolution models for some of the most massive and short-lived stars in the Universe.
03 Feb

As simple as possible but no simpler: Modeling for cosmic and terrestrial applications

03 February 2025 - 3:30 PM
1300 FRIB Laboratory and Online via Zoom
Air Force Institute of Technology

Zach Meisel

Show/Hide Abstract
Modeling is an essential component of understanding the physical world. However, the closer one looks, the more details there are to model. Selection of the modeling approach comes down to the principle “as simple as possible, but no simpler”. In this presentation I will show the application of this principle to problems in nuclear astrophysics, homeland security, and radiological emergencies.
04 Feb

Scaling law of quantum entanglement in nuclear shell model

04 February 2025 - 11:00 AM
1200 FRIB Laboratory and Online via Zoom
Hohai University

Dong Bai

Show/Hide Abstract
Quantum entanglement represents a classically forbidden form of correlation shared between separate local subsystems. The atomic nucleus serves as an ideal platform for exploring quantum entanglement at subatomic scales. A key characteristic of quantum entanglement is its scaling behavior with respect to subsystem size. Motivated by a recent study [Gu et al., Phys. Rev. C 108, 054309 (2023)], I investigate the scaling behavior of orbital entanglement in nuclear shell model. The results show that the average orbital entanglement entropy follows a Page-like curve, consistent with volume law scaling, for both ground and excited states. This finding suggests the absence of an entanglement crossover from area law to volume law in the nuclear shell model, distinguishing it from typical condensed matter systems. Additionally, the influence of angular momentum conservation on orbital entanglement is examined.
05 Feb

As Simple as Possible but No Simpler: Modeling for Cosmic and Terrestrial Applications

05 February 2025 - 3:30 PM
Online via Zoom
Air Force Institute of Technology

Zach Meisel

Show/Hide Abstract
Modeling is an essential component of understanding the physical world. However, the closer one looks, the more details there are to model. Selection of the modeling approach comes down to the principle “as simple as possible, but no simpler". In this presentation I will show the application of this principle to problems in nuclear astrophysics, homeland security, and radiological emergencies.
07 Feb

Applying machine learning techniques to the operation and optimization of the VENUS ECR ion source

07 February 2025 - 3:00 PM
Online via Zoom
Lawrence Berkeley National Laboratory

Damon Todd

Show/Hide Abstract
TBD
09 Feb

What can theoretical physics tell us about the origin and evolution of early life?

09 February 2025 - 3:00 PM
Online via Zoom
University of California San Diego

Nigel Goldenfeld

Show/Hide Abstract
Life on Earth is wonderfully diverse, with a multitude of life forms, structures and evolutionary mechanisms. However, there are two aspects of life that are universal - shared by all known organisms. These are the genetic code, which governs how DNA is converted into the proteins making up your body, and the unexpected left-handedness of the amino acids in your body. One would expect that your amino acids were a mixture of left and right-handed molecules, but none are right handed! In this talk, I describe how these universal aspects of biology can be understood as arising from evolution, but generalized to an era where genes, species and individuality had not yet emerged. I will also discuss to what extent one can find general principles of biology that can apply to all life in the universe, and what this would mean for the nascent field of astrobiology. Prof. Nigel Goldenfeld holds the Chancellor's Distinguished Professorship in Physics and joined UCSD in Fall 2021 after 36 years at the University of Illinois at Urbana-Champaign (UIUC). His research spans condensed matter theory, the theory of living systems, hydrodynamics and non-equilibrium statistical physics. He received his Ph.D in theoretical physics from the University of Cambridge (UK) in 1982, and for the years 1982-1985 was a postdoctoral fellow at the Institute for Theoretical Physics, University of California at Santa Barbara, where his work on the dynamics of snowflake growth helped launch the modern theory of pattern formation in nature. He joined the condensed matter theory group at the Department of Physics, UIUC in 1985, where his work was instrumental to the discovery of d-wave pairing in high temperature superconductors. In 1996, he co-founded NumeriX, a company that develops high-performance software for pricing and risk managing derivative securities. His interests in biology include microbial ecology, evolution and systems biology. He was a founding member of the Institute for Genomic Biology at UIUC, where he led the Biocomplexity Group and directed the NASA Astrobiology Institute for Universal Biology. During the COVID-19 pandemic, he pivoted from his experience in mathematical modeling of bacteria and viruses to computational epidemiology, advising the Governor of Illinois, and helping devise, set up and run the COVID saliva testing system at UIUC, which provided ~12 hour turnaround of PCR tests to the 50,000 people in the campus community and eventually to over 1700 schools and other institutions in Illinois and beyond. He has served on the editorial boards of several journals, including The Philosophical Transactions of the Royal Society, Physical Biology and the International Journal of Theoretical and Applied Finance. Selected honours include: Alfred P. Sloan Foundation Fellow, University Scholar of the University of Illinois, the Xerox Award for research, the A. Nordsieck award for excellence in graduate teaching and the American Physical Society's Leo P. Kadanoff Prize 2020. He is a Fellow of the American Physical Society, a Fellow of the American Academy of Arts and Sciences, a Fellow of the Royal Society (UK) and a Member of the US National Academy of Sciences.
10 Feb

ASG Violin-Piano Duo Concert: "The Muse" performed by Dmitri Berlinsky (Violin) and Jiarui Cheng (Piano)

10 February 2025 - 6:00 PM
1300 FRIB Laboratory
Show/Hide Abstract
Program: Sonata No 1, Op.105 I. Mit leidenschaftlichem Ausdruck II. Allegretto III. Lebhaft Robert Schumann (1810-1856) Three Romances for Violin and Piano, Op.22 I. Andante molto II. Allegretto III. Leidenschaftlich schnell Clara Schumann (1819-1896) Violin Sonata No. 3 in D minor, Op. 108 I. Allegro II. Adagio III. Un poco presto e con sentimento IV. Presto agitato Johannes Brahms (1833-1897) Dmitri Berlinsky, professor of violin and artist teacher at the Michigan State University College of Music, has performed in major venues such as Carnegie and Avery Fisher Halls in New York, Kennedy Center in Washington DC, Tokyo’s Suntory Hall, Great Hall of the Moscow Conservatory, Mariinsky Concert Hall. Recent highlights include appearances as a soloist in Berlin Philharmonie Hall, Vienna Konzerthaus, Frankfurt Alte Opera House, Leipzig Gewandhaus, Munich Philharmonic, among others on European concert tour “Paganini Night” with Russian Philharmonic of St. Petersburg. Last season Mr. Berlinsky performed and taught at the Cleveland Institute of Music, Royal Conservatory and Glen Gould School in Toronto, Tel Aviv University, Eastman School of Music, China Conservatory in Beijing, Xiamen and Fujian Universities in China, National University of Singapore and Institute of Music in Thailand. In high demand as a teacher, Mr.Berlinsky has given Master Classes at the University of South California in Los Angeles, Menuhin School in London, Manhattan School, Temple University in Philadelphia, DePaul and Roosevelt University in Chicago and served on the jury of Paganini International Competition, Washington International Competition, YCA and Astral Auditions. Mr. Berlinsky is a founder of “Dorothy DeLay MasterClass Series” and Artistic Director of “International Chamber Soloists”. He is the co-founder of “Juventus ProMusica” concert series in New York City, providing chamber music experiences for young students alongside distinguished guest artists. Mr. Berlinsky arrived on the international scene as the youngest winner in the history of the Paganini International Violin Competition in Genoa, Italy. This victory led to his performance on Nicolo Paganini's own Guarneri del Gesú instrument, a privilege shared by only a handful of artists in history. Subsequent triumphs at the Montreal International Violin Competition (Grand Prize), the International Tchaikovsky Competition and the Queen Elizabeth Competition in Brussels, led to appearances with major orchestras in Europe, Russia, the Far East, North and South America. Jiarui Cheng from Nanjing, China, is known for his blend of artistic nuance and bravura pianism. He is hailed for his affinity for a wide range of stylist traditions. Jiarui Cheng has performed as concerto soloist and recitalist in China, United States and Europe. He has been featured as concerto soloist with the Shanghai Conservatory of Music Symphony Orchestra for the Conservatory’s 70th Anniversary Celebration Concert, performing Beethoven Piano Concerto No. 4 in Shanghai Symphony Hall. He subsequently performed Beethoven No. 4 with the Grossetto Symphony Orchestra in Italy. Jiarui Cheng has been a prizewinner in multiple competitions including the Scriabin International Piano Competition and the National Piano Competition in Shanghai. In 2019 he performed Rachmaninoff 3rd Piano Concerto to great acclaim with The Cleveland Institute of Music Orchestra as winner of the CIM Concerto Competition. As recipient of the Niu Ende Piano Scholarship, Jiarui Cheng studied at the Shanghai Conservatory of Music with Professor Jin Tang. He is currently studying with Stanislav Ioudenitch who was the Gold Medalist of eleventh Van Cliburn international piano competition. He was one of semi-finalists of Cleveland International piano competition and Santander International piano competition. In 2023 he performed Grieg piano concerto with Aspen Conducting Academy orchestra as winner of Aspen concerto competition. He also performed Beethoven piano concerto No.4 with Tongyeong Music Festival Orchestra as prize winner of ISANGYUN International Piano Competition. Jiarui Cheng has studied piano with Margarita Shevchenko and Eric Zuber at Michigan State University’s College of Music.
12 Feb

An overview of the MUSES cyberinfrastructure and what it can do for you

12 February 2025 - 3:30 PM
1300 FRIB Laboratory and Online via Zoom
Kent State University

Veronica Dexheimer

Show/Hide Abstract
At high energy, the fundamental description of matter (Quantum Chromodynamics or QCD) is currently only directly applicable to specific regimes, leaving large portions of the QCD phase diagram uncharted, especially around the regime relevant for neutron stars. To bridge different regimes, the MUSES collaboration has built a cyberinfrastructure that provides descriptions of matter based on first-principle theories and models across the multidimensional QCD phase diagram, including thermodynamics but also observables pertinent to heavy-ion collisions, astrophysics, and more. Our online platform allows users to choose different descriptions (with different parametrizations), how these are connected, and what observables they reproduce. The platform is open for everyone, and all our code is open source.
14 Feb

How The Gentle Winds Beckon: Nucleosynthesis in Neutron Star Merger Remnant Winds

14 February 2025 - 2:00 PM
2025 FRIB Laboratory and Online via Zoom
UC Berkeley

Kelsey Lund

Show/Hide Abstract
The rapid neutron capture process (r-process) is one of the main mechanisms whereby elements heavier than iron are synthesized, and is entirely responsible for the natural production of the actinides. Now more over 50 years ago, it was proposed that the r-process could occur in the unbinding of material during the inspiral and merger of either a neutron star and black hole, or two neutron stars. Multi-messenger observations of the binary neutron star merger, GW170817, provided the first confirmation of lanthanide production in the merger ejecta. However, the full picture of the role these mergers play in the production of galactic r-process abundances remains unclear. Understanding the intricacies of nucleosynthesis in neutron star mergers is a multi-physics problem spanning several orders of magnitude in both physical and temporal scales. I will discuss work that combines the use of r-process network calculations, general relativistic magnetohydrodynamics simulations with neutrino transport, and chiral effective field theory-informed nuclear equations of state to probe uncertainties in r-process production from post-neutron-star-merger accretion disks.
14 Feb

Towards the Next Generation High-Brightness Electron Source

14 February 2025 - 2:00 PM
1200 FRIB Laboratory and Online via Zoom
FRIB Graduate Research Assistant

Ziye Yin

Show/Hide Abstract
Committee: Ting Xu (Chairperson), Sergey Baryshev Xianglin Ke, John Lewellen, John Smedley, Remco Zegers
18 Feb

Investigating Fission Dynamics within Time-Dependent Density Functional Theory Extended to Superfluid Systems

18 February 2025 - 11:00 AM
1200 FRIB Laboratory and Online via Zoom
Los Alamos National Laboratory

Ibrahim Abdurrahman

Show/Hide Abstract
Despite being discovered over 86 years ago, fission still lacks a complete microscopic description, making it one of the oldest problems in quantum many-body theory. For comparison, superconductivity was discovered in 1911 and described microscopically in 1957 by the BCS theory. Fission is particularly difficult to treat theoretically in a unified manner as it contains many qualitatively distinct processes, each of which occurs at vastly different timescales, from the entrance channel (such as neutron absorption) to the splitting of a deformed nucleus into two fragments to the subsequent emission of radiation (typically gamma rays and neutrons). In 2016, the first simulation of the most rapid and highly non-equilibrium stage of fission, the evolution of the compound nucleus from the outer saddle point to scission to the formation of two fully separated fission fragments (FFs), was achieved for realistic initial conditions. This was done in the framework of the time-dependent superfluid local density approximation (TDSLDA) or equivalently time-dependent density functional theory extended to superfluid systems. Since the first study concerning 240Pu, TDSLDA has been applied extensively to compound systems 236U, 240Pu, and 252Cf (spontaneous fission), and recently to odd systems 239U, 241Pu, and 238Np. During this talk I will summarize the results of such investigations, covering the following topics: the role of pairing correlations during fission, the properties of the FF spins and their correlations, complexity and entanglement, the dynamics of the neck rupture and emission of scission neutrons, the differences between odd and even-even fission dynamics, and the energy dependence of fission observables.
19 Feb

A new approach to measuring neutrino mass

19 February 2025 - 3:30 PM
1300 FRIB Laboratory and Online via Zoom
University of Washington

Elise Novitski

Show/Hide Abstract

Of all the fundamental fermion masses, those of the neutrinos alone remain unmeasured. From their unknown origin to their effects on the evolution of the universe, neutrino masses are of interest across cosmology, nuclear physics, and particle physics. Neutrino oscillation experiments have set a non-zero lower limit on the mass scale, in contradiction to the original Standard Model prediction. To measure neutrino mass precisely and directly one must turn to beta decay and search for a telltale distortion in the spectrum. I will describe a new technique called Cyclotron Radiation Emission Spectroscopy (CRES), in which beta decay of tritium occurs in a magnetic field and each electron's ~1 fW of cyclotron radiation is directly detected. Electron energies are then determined via a relativistic relationship between energy and frequency. I will present the first CRES-based mass limits from the Project 8 experiment, which demonstrate the promise of this technique for surmounting the systematic and statistical barriers that currently limit the precision of direct neutrino mass measurements. I will also describe the next steps on the path to sensitivity to a mass of 40 meV/c^2, covering the entire inverted ordering of neutrino masses.

21 Feb

EIC RF Systems: A Good RF Challenge to Have

21 February 2025 - 3:00 PM
1200 FRIB Laboratory and Online via Zoom
Brookhaven National Laboratory/Jefferson Lab

Zack Conway

Show/Hide Abstract

The Electron Ion Collider Project will upgrade the Brookhaven National Laboratory Relativistic Heavy Ion Collider complex to collide highly polarized (>70%) electrons and ions, from deuterons to the heaviest stable nuclei, with center-of-mass energies spanning 20 to 100 GeV at luminosities of 1033-1034 cm-2 s-1.  To achieve these goals a set of 4 unique superconducting radio frequency systems are required for beam acceleration, storage, and crabbing.  This seminar will briefly review the EIC as it relates to the radio-frequency systems, and then focus on the high-intensity beam interactions with the superconducting radio-frequency (SRF) systems.  Examples will include the 800 kW 2.0 K SRF cryomodules necessary for storing up to 2.5 A electron beams with ~ 10 MW of continuous power loss, 25 mrad crossing angle crab cavities, and the state-of-the-art damping required for all of the superconducting cavities.

28 Feb

TACTIC: a detector for nuclear astrophysics

28 February 2025 - 2:30 PM
2025 FRIB Laboratory and Online via Zoom
TRIUMF

Soham Chakraborty

Show/Hide Abstract
TACTIC is a cylindrical active target time projection chamber, jointly developed by the University of York and TRIUMF. The detector facility is suitable for the direct measurement of alpha-induced charged particle reactions, important for understanding nucleosynthesis in different cosmic environments. The reaction cross section measurements rely on the tracking, detection, and identification of the reaction products by means of differential energy loss in the gaseous detection volume. In order to detect the reaction products over a wide range of energies (tens of keV to a few MeV), the novel μ-RWELL (micro-Resistive WELL) detectors are used in TACTIC as the gas multiplication stage. An unique central cathode cage configuration enables the detector to accommodate higher beam intensities (in the order of 10^7 pps) compared to other active target detectors. This specific feature, combined with a high detection efficiency, allows the measurements of low cross sections (in the order of μb) utilising radioactive ion beams in the astrophysically important energy regions of interest. The first successful cross section measurement using TACTIC was performed in 2022 at the TRIUMF ISAC-I facility. The astrophysically important and experimentally well-constrained 23Na(⍺, p)26Mg reaction was studied as a commissioning experiment. Prior to their installation in TACTIC, a detailed characterisation of the μ-RWELL detectors in different gas mixtures and pressures was performed utilising a planar test chamber. The installation marked the very first integration of the state-of-the-art μ-RWELL detectors inside a cylindrical geometry for charged particle tracking. I will discuss the results from the test chamber and TACTIC tests as well as the planned future developments.
04 Mar

Extending the reach of nuclear ab initio approaches with tensor factorization

04 March 2025 - 11:00 AM
1200 FRIB Laboratory and Online via Zoom
Centre DAM-Île de France

Lars Zurek

Show/Hide Abstract
Nuclear ab initio calculations are commonly limited by the computational cost of handling very large tensors, especially when breaking rotational symmetry. Applying a singular value decomposition to nucleon-nucleon and three-nucleon potentials obtained from chiral effective field theory reveals that such interactions possess low-rank structure. Exploiting these low-rank properties could allow to extend the reach of ab initio approaches to heavy open-shell nuclei. However, this is a nontrivial task as it requires reformulation of the computational method used to solve the many-body Schrödinger equation. I will present our ongoing work on employing tensor factorization techniques in Bogoliubov many-body perturbation theory, which uses modern linear algebra algorithms and avoids to construct large many-body tensors in the first place.
07 Mar

ASG Violin and Piano Recital: Lin He (violin) and Michael Gurt (piano)

07 March 2025 - 7:30 PM
1300 FRIB Laboratory
Show/Hide Abstract
Program: Sonata No. 1 for Violin and Piano, B. 42 Ernest Bloch (1880-1959) I. Agitato II. Molto quieto III. Moderato Intermission Sonata No. 2 for Violin and Piano, Op. 36a Ferruccio Busoni (1866-1924) I. Langsam II. Presto III. Andante, piuttosto grave. Andante con moto Lin He is Associate Professor of Violin at the Louisiana State University School of Music and Associate Concertmaster of the Baton Rouge Symphony. Prof. He also teaches at the Las Vegas Chamber Music Institute, Summit Music Festival and Institute, Sewanee Summer Music Festival, InterHarmony International Summer Music Festival, Montecito International Music Festival and BayView Music Festival. He has performed at Carnegie Hall with principal players from the Metropolitan Opera, New York Philharmonic and Philadelphia Orchestra. Over the past seasons, he has performed the Bruch Scottish Fantasy with the Sonoma County Philharmonic, Chausson Poeme and Korngold Concerto with the Rapides Symphony Orchestra, Mendelssohn Violin Concerto with the Shippensburg Symphony, and the Sibelius Concerto with the Lake Charles Symphony. The 2024-2025 season of concerts include recitals in Oklahoma City University, Houghton University, University of Oklahoma, and the US premiere of the first edition of Verdi’s String Quartet. His recordings include “French Sonatas for Violin and Piano” with pianist Gregory Sioles and “Trios by Saint-Saëns, Piston, and Zemlinsky: Piano Trios” with cellist Daniel Cassin and pianist Constance Carroll, both released by Centaur Records. Recently, he shared the stage with the Shanghai String Quartet and violinists Charles Castleman and Richard Lin and presented solo recitals and master classes at Arizona State University, Florida State University, Longy School of Music, San Francisco Conservatory of Music, University of Houston, University of Las Vegas, University of North Texas, and University Alberta, Edmonton, Canada. Born in Shanghai, China, Lin He began his musical training began at the age of five and received his doctorate from the Eastman School of Music, where he studied under the tutelage of Zvi Zeitlin. Other major influences include Steven Staryk, Sylvia Rosenberg, Kyung Sun Lee, Paul Kantor and Dating He, concertmaster of the Shanghai Opera House for 22 years. Michael Gurt is Paula Garvey Manship Distinguished Professor of Piano at Louisiana State University. He won First Prize in the Gina Bachauer International Piano Competition in 1982, and was a prize winner in international competitions in Pretoria, South Africa, and Sydney, Australia. He has performed as soloist with the Chicago Symphony, the Philadelphia Orchestra, the Utah Symphony, the Baltimore Symphony, the Memphis Symphony, the Capetown Symphony, the China National Symphony Orchestra, and the Natal Philharmonic Orchestra in Durban, South Africa. He has made solo appearances in Alice Tully Hall and Weill Recital Hall (Carnegie Hall) in New York, Ambassador Auditorium in Los Angeles, Orchestra Hall in Detroit, City Hall in Hong Kong, the Victorian Arts Center in Melbourne, Australia, Baxter Hall in Capetown, South Africa, and the Attaturk Cultural Center in Istanbul, Turkey. He has made several tours of Brazil and recently performed in Porto and Lisbon, Portugal. Gurt has collaborated with the Takacs String Quartet and the Cassatt String Quartet, and has performed at the Australian Festival of Chamber Music in Townsville, Queensland. He has served on the juries of both the Gina Bachauer International Piano Competition and the New Orleans International Piano Competition, and he has recorded on the Naxos, Centaur, and Redwood labels. Gurt serves as Piano Mentor at the National Music Festival in Chestertown, Maryland, and was the chair of the piano department at the Sewanee Summer Music Festival from 1987 through 2007. He has served as Piano Chair of the Louisiana Music Teachers Association, and has taught at two summer music seminars held at Tunghai University in Taichung, Taiwan. Professor Gurt holds degrees from the University of Michigan and the Juilliard School.
10 Mar

Neutron stars as unique probes of nuclear physics

10 March 2025 - 12:00 PM
1200 FRIB Laboratory and Online via Zoom
IRAP, University of Toulouse

Sebastien Guillot

Show/Hide Abstract
More than 50 years after the discovery of neutrons stars, their interior composition and structure remains unknown. Because the extreme densities and matter asymmetry in neutron star interiors are out of reach for Earth laboratories, the equation of state of bulk nuclear matter is unknown, with important implication for astrophysics and nuclear physics. Thankfully, measurements of neutron stars masses and radii are direct probes of the interior of these compact objects. In the past two decades, X-ray observatories have provided some measurements of neutron star radii and therefore some constraints on the dense matter equation of state. But recently, the results from the NICER Observatory have provided the most promising, robust and precise constraints. I will review some of the key results from the NICER mission (including the most recent measurements) and give an overview of other existing measurements of masses and radii, as well as present their impact on our knowledge of dense nuclear matter. Finally, I will detail future prospects to constrain the equation of state of dense nuclear matter with upcoming X-ray observatories.
10 Mar

Understanding and Quantifying Impacts of the Continuum on Nuclear Structure

10 March 2025 - 2:00 PM
1200 FRIB Laboratory and Online via Zoom
FRIB Graduate Research Assistant

Joshua Wylie

Show/Hide Abstract
Committee: Witold Nazarewicz (Chairperson), Metin Aktulga, Paul Gueye, Filomena Nunes, Johannes Pollanen. Thesis is available @ https://pa.msu.edu/graduate-program/current-graduate-students/draft-dissertations-for-review.aspx - Select student name
11 Mar

Novel Computational Approaches for Nuclear Fission Theory

11 March 2025 - 12:00 PM
1200 FRIB Laboratory and Online via Zoom
FRIB Graduate Research Assistant

Daniel Lay

Show/Hide Abstract
Committee: Witold Nazarewicz (Chairperson), Heiko Hergert, Ryan LaRose, Hendrik Schatz, Yang Yang Thesis is available @ https://pa.msu.edu/graduate-program/current-graduate-students/draft-dissertations-for-review.aspx - Select student name
11 Mar

Some recent trends in nuclear reaction theory for basic science and applications

11 March 2025 - 2:00 PM
1200 FRIB Laboratory and Online via Zoom
University of Seville, Spain

Gregorio Potel Aguilar

Show/Hide Abstract
In recent times, it has become commonplace to mention the unification of structure and reaction nuclear theory as one of the hot topics in low-energy nuclear physics. This interest is, of course, not new, but some present circumstances might have made it more acute. First, the experimental access to very weakly bound or unbound nuclei has blurred the limits between structure and reaction theory. Second, the fast development of computational tools and resources has rendered scattering problems tractable with bound states techniques. We will also address some ideas in the path to another important unification: the theory of direct and compound nucleus reactions. This line of research is important in order to address important processes, such as capture reactions, involving nuclei away from the stability valley, where an unusually low level density calls for the description of a transition between the statistical and direct reaction regimes.
12 Mar

Precision Parity Violating Electron Scattering Experiments

12 March 2025 - 3:30 PM
1300 FRIB Laboratory
University of Indiana, Bloomington

Caryn Palatchi

Show/Hide Abstract
The RMS radii of the neutron distribution in both 208Pb and 48Ca have been precisely measured by the PREX and CREX experiments via the parity violating asymmetry in longitudinally polarized elastic electron-nucleus scattering. The advantage of these parity violating electron scattering measurements lies in the use of an electroweak probe to measure these quantities, significantly reducing uncertainties from theoretical interpretations. The PREX measurement of the large 208Pb nucleus, for which nuclear density functional theory can be applied, provides meaningful constraints on the density dependence of the symmetry energy of neutron-rich nuclear matter; an important parameter for the nuclear equation of state. The complimentary CREX measurement of the modestly sized, neutron rich 48Ca nucleus, for which edge effects are significant, provides an important benchmark for nuclear theory to help bridge ab-initio theoretical approaches and the nuclear density functional theory. While the electroweak nature of the interaction lends itself to a clean interpretation of the results it also presents significant experimental hurdles, including the need to employ innovative precision beam control techniques. This talk will give an overview experimental results from the PREX and CREX collaborations, will touch upon the tension observed between these results and select theoretical calculations and measurements, and will describe the techniques employed to meet the stringent systematic uncertainty goals arising from beam asymmetries during the PREX-II and CREX experiments. The upcoming MOLLER experiment which will utilize these beam control techniques to search for new BSM (Beyond the Standard Model) physics through ultra-precise measurement of the weak charge of the electron will also be discussed.
14 Mar

Primordial r-process dispersions in globular clusters

14 March 2025 - 2:00 PM
2025 FRIB Laboratory and Online via Zoom
University of Notre Dame

Evan Kirby

Show/Hide Abstract
Stars in nearly all globular clusters show complex relations among the abundances light elements (up to Na). Many also show anti-correlations of Mg and Al. A rare few display variations in K. Until a few years ago, only one cluster (M15) conclusively showed any star-to-star variation in neutron-capture elements, like Eu. Using a trick of stellar evolution, I show that these variations are primordial, not caused by external pollution. I also show evidence that M92 also has variations in neutron-capture abundances among the first generation of stars but not the second. The evidence points to a very prompt, rare source of r-process enrichment. I will close with ongoing work at Notre Dame to interrogate other globular clusters for their secrets about the r-process.
14 Mar

Study of Pulse Length Limitations and Current Density Measurement Optimization for Low-b Electron Beams

14 March 2025 - 3:00 PM
1300 FRIB Laboratory and Online via Zoom
FRIB Graduate Research Assistant

Madison Howard

Show/Hide Abstract
Committee: Steven Lidia (Thesis Advisor), Scott Pratt (Committee Chair), Sergey Baryshev Joshua Coleman, Artemis Spyrou. Thesis is available @ https://pa.msu.edu/graduate-program/current-graduate-students/draft-dissertations-for-review.aspx - Select student name
14 Mar

String Quartet and String Trio Concert

14 March 2025 - 6:00 PM
1300 FRIB Laboratory
Show/Hide Abstract
Trio in A major for two violin and viola by Mykola Lysenko I. Andante. Allegro animato II. Romance III. Scherzo IV. Finale Bios: Mengyuan Song is a violist from China. She is currently a first year DMA student at Michigan State University, studying violia performance with Professor Mike Chen. She previously completed the master degree from The University of Northern Colorado and completed Graduate Professional Diploma from The Hartt School. Min-Han Tsai is a violinist from Taiwan. He is currently a first year DMA student at Michigan State University, studying violin performance with Professor I-Fu Wang. He previously completed the master degree and a performance Certificate from Bowling Green State University, and he was the concertmaster of the BGSU Philharmonia and performed in the Graduate String Quartet. Min-Han is currently an active performer in Michigan. Lyudmila Gofurova is a violinist from Tashkent, Uzbekistan. She is currently pursuing a Master's degree in Violin Performance at Michigan State University under the guidance of Professor Yvonne Lam. She earned her Bachelor's degree in Tashkent. As a member of the Uzbekistan Youth Symphony Orchestra and the National Symphony Orchestra of Uzbekistan, she has performed in over 10 countries. Lyudmila is an active performer, chamber musician, and dedicated educator in Michigan.
19 Mar

Mapping the new asymmetric fission island with the R3B/SOFIA setup

19 March 2025 - 3:30 PM
1300 FRIB Laboratory and Online via Zoom
CEA-DAM

Pierre Morfouace

Show/Hide Abstract

The low energy fission in the actinide region is known to be mainly asymmetric, driven by structure effects of the nascent fragments [1]. Moreover, we know that there is a transition from asymmetric to symmetric splitting for Thorium isotopes. It was assumed that this latter split would be the main fission mode for lighter nuclei. However, unexpected asymmetric splits have been observed again in neutron- deficient exotic nuclei [2]. This observation triggered a lot of theoretical and experimental work, and further studies in this region confirmed the unexpected asymmetric fission mode [3, 4], which seems to characterize the fission of neutron-deficient nuclei in the sub-lead region.

To explore this newly identified island of asymmetric fission, a dedicated experiment was conducted at GSI, Darmstadt, Germany, using inverse kinematics at relativistic energies with the state-of-the-art R3B/SOFIA setup [5]. We present measurements of fission fragment charge distribution from 100 exotic fissioning systems, establishing a connection between the neutron-deficient sub-lead region and the well- known actinide region. These new data provide a comprehensive mapping of the asymmetric fission island, offering clear experimental evidence of the important role played by the deformed Z = 36 proton shell in the fission of sub-lead nuclei [6].

Following a detailed description of the experimental apparatus, we will discuss the fission-fragment charge yields, highlighting the significant role of Z = 36 in the light fragment in the splitting process within this region. Additionally, we will compare our findings with both microscopic and phenomenolog- ical models.

 

References

[1] G. Scamps and C. Simenel, Nature 564, 382-385 (2018).

[2] A. N. Andreyev et al., Phys. Rev. Lett. 105, 252502 (2010).

[3] M. Warda et al., Phys. Rev. C 86, 024601 (2012).

[4] K. Nishio et al., Phys. Lett. B 748, 89-94 (2015).

[5] A. Chatillon et al., Phys. Rev. Lett. 124, 202502 (2020).
 
[6] P. Morfouace et al., Accepted in Nature (2025).

20 Mar

Distinguished Nuclear Policy Lecture Series - Peter Clement

20 March 2025 - 6:00 PM
1300 FRIB Laboratory
Columbia University, School of International and Public Affairs

Peter Clement

Show/Hide Abstract
A James Madison College event at FRIB.
21 Mar

PIP-II SRF Cavities and Magnets Alignment: From Physics Requirements to Real-Time Monitoring

21 March 2025 - 3:00 PM
1200 FRIB Laboratory and Online via Zoom
Fermilab

Jacopo Bernardini

Show/Hide Abstract
TBD
23 Mar

How hyperbolic organization facilitates learning in biology

23 March 2025 - 1:00 PM
Online via Zoom
Salk Institute for Biological Studies

Tatyana Sharpee

Show/Hide Abstract
Learning is one way how biological systems change. Evolution can also be thought of as learning but on longer time scales. This presentation will describe emerging evidence showing that biological systems organize them according to hyperbolic surfaces and that these surfaces expand according to similar principles in both learning and evolution. Across different scales of biological organization, biological networks often exhibit hierarchical tree-like organization. For networks with such structure, hyperbolic geometry provides a natural metric because of its exponentially expanding resolution. I will describe how the use of hyperbolic geometry can be helpful for visualizing and analyzing information acquisition and learning process from across biology, from viruses, to plants and animals, including the brain. We find that local noise causes data to exhibit Euclidean geometry on small scales, but that at broader scales hyperbolic geometry becomes visible and pronounced. The hyperbolic maps are typically larger for datasets of more diverse and differentiated cells, e.g. with a range of ages. We find that adding a constraint on large distances according to hyperbolic geometry improves the performance of t-SNE algorithm to a large degree causing it to outperform other leading methods, such as UMAP and standard t-SNE. For neural responses, I will describe data showing that neural responses in the hippocampus have a low-dimensional hyperbolic geometry and that their hyperbolic size is optimized for the number of available neurons. It was also possible to analyze how neural representations change with experience. In particular, neural representations continued to be described by a low-dimensional hyperbolic geometry but the radius increased logarithmically with time. This time dependence matches the maximal rate of information acquisition by a maximum entropy discrete Poisson process, further implying that neural representations continue to perform optimally as they change with experience. Tatyana Sharpee received her PhD in condensed matter physics from Michigan State University studying under the supervision of Mark Dykman. After her PhD, she started to work in computational neuroscience at UCSF where she developed statistical methods for analyzing neural responses to natural stimuli, which exhibit strong correlations and non-Gaussian effects. These methods made it possible to reveal new adaptation processes in the brain by comparing neural responses to white noise and natural stimuli. Her independent research program has started at the Salk Institute for Biological Studies where she is currently a Professor in the Computational Neurobiology and Integrative Biology Laboratories. Dr. Sharpee is a fellow of the American Physical Society.
26 Mar

Toward Pursuing New Superheavy Elements

26 March 2025 - 3:30 PM
1300 FRIB Laboratory and Online via Zoom
Lawrence Berkeley National Laboratory

Jacklyn Gates

Show/Hide Abstract

In the past two decades, significant progress has been made with the discovery of elements Z=114-118 through reactions between 48Ca beams and actinide targets, achieving production rates of atoms-per-day or more. Unfortunately, the pursuit of elements beyond Oganesson (Z=118) faces substantial challenges, with no new elements have been discovered in the last 15 years. The synthesis of elements with Z=119 or 120 using 48Ca would necessitate targets of Es (Z=99) or Fm (Z=100), but these elements cannot be produced in sufficient quantities. This limitation necessitates exploring new reaction pathways.

 

Numerous theoretical studies have aimed at predicting production rates for new elements using actinide targets and heavier ion beams. While these models reliably reproduce excitation functions for SHE production with 48Ca beams, predictions diverge significantly for reactions involving heavier beams. For instance, the predicted cross section for reactions to produce Z=120 vary by more than three orders of magnitude and tens of MeV. These discrepancies hinder experimental efforts, as the low expected cross sections suggest the detection of only one event every few weeks or months under ideal conditions.

 

Berkeley Lab has been proactively addressing these challenges to push beyond E118. By testing theoretical predictions, we have begun the 50Ti+244Pu experiment to understand the impact of using 50Ti instead of 48Ca beams on cross sections. This presentation will highlight significant upgrades to our experimental facilities, including ion sources, target setups, detectors, and electronics, aimed at enhancing our capability to produce and detect elements beyond E118. We will also present the initial results from the 50Ti+244Pu experiment, showcasing our progress in this ambitious endeavor.

28 Mar

Classical novae at the crossroads of nuclear physics, astrophysics and cosmochemistry

28 March 2025 - 2:00 PM
2025 FRIB Laboratory and Online via Zoom
Technical University of Catalonia, UPC (Barcelona, Spain)

Jordi Jose

Show/Hide Abstract
Classical novae are thermonuclear explosions that take place in the H-rich envelopes of accreting white dwarfs in stellar binary systems. The material piles up under degenerate conditions, driving a thermonuclear runaway. The energy released by the suite of nuclear processes operating at the envelope heats the material up to peak temperatures of (100 - 400) MK. During these events, about 10-7 - 10-4 solar masses, enriched in CNO, and sometimes, other intermediate-mass elements (e.g., Ne, Na, Mg, Al) are ejected into the interstellar medium. Infrared and ultraviolet observations of novae have confirmed grain formation in their expanding shells. This has raised the issue of the potential contribution of novae to the current inventory of presolar grains. I will review several studies that have led to the identification of a handful of presolar grains with isotopic signatures consistent with a nova origin. Mixing at the core-envelope interface still remains as an important unknown in the modeling of classical novae. I will review as well recent results from multidimensional simulations of mixing by hydrodynamic (Kelvin-Helmholtz) instabilities and shear. Strategies to export mixing prescriptions obtained from such multidimensional simulations for follow-up studies with 1D codes will also be discussed. Finally, I will also present recent recurrent nova models, aimed at characterizing T CrB, a system that should undergo an explosion imminently. In most recurrent novae, the mass of the accreting white dwarf is expected to be very close to the Chandrasekhar value, as imposed by their short recurrence periods. Simulations suggest that such white dwarfs grow in mass, making recurrent novae likely candidates for thermonuclear supernovae.
31 Mar

No First Use of Nuclear Weapons: A Policy Assessment

31 March 2025 - 3:00 PM
1200 FRIB Laboratory
Institute for Defense Analyses

Rhiannon Hutton

Show/Hide Abstract
In 2020, Congress mandated that the Department of Defense study the potential ramifications of the U.S. adopting a no-first-use (NFU) policy, whereby a nuclear power pledges not to employ nuclear weapons except in response to an adversary’s nuclear attack. The Department asked the Institute for Defense Analyses (IDA), a Federally Funded Research and Development Center, to assess how this change to U.S. declaratory policy might impact U.S. force posture, the views of U.S. allies, the views of U.S. adversaries and the risk of miscalculation, and nuclear nonproliferation. IDA concluded that U.S. adoption of an NFU policy would not bring about a setting that was more conducive to positive behavior by adversaries or to strengthened relations with allies. In light of existing constraints on U.S. policy and procedure governing nuclear use, the weight of the evidence indicated significant potential for NFU to impart more harm than good.
01 Apr

Knock It Out of the Nucleus -Structure of Nuclei Revealed by Knockout Reactions

01 April 2025 - 11:00 AM
1200 FRIB Laboratory and Online via Zoom
Kyushu University

Kazuyuki Ogata

Show/Hide Abstract
What do atomic nuclei look like? There are several known images of nuclei: liquid droplets, independent nucleons "moving" in a mean potential, and clusters of nucleons floating in the nucleus. One of the methods to capture the different images of nuclei is the knockout reaction. In this reaction, the components of the nucleus are knocked out by incident particles at intermediate energies. If the rest of the nucleus is not disturbed except for the knocked-out particle, it can be determined to what extent the knocked-out particle was present in the nucleus and how it moved. By knocking out nucleons or clusters, the image of the nucleus captured by the independent particle or cluster image emerges. In this talk I will give an overview of our recent activities on nucleon and cluster knockout reactions from stable and unstable nuclei. From a theoretical point of view, the focus will be on the development of a new reaction model, CDCCIA, for the knockout of fragile particles.
02 Apr

Illuminating heavy element production using MeV gamma-rays and metal-poor stars

02 April 2025 - 3:30 PM
1300 FRIB Laboratory and Online via Zoom
TRIUMF

Nicole Vassh

Show/Hide Abstract
Fingerprints of the properties of exotic nuclei on nucleosynthesis observables have been used for decades to frame our picture of how the heaviest elements in our Solar System came to be. The abundance of elements in our Sun, as well as nearby metal-poor stars, hints at multiple neutron capture nucleosynthesis processes, the slow (s), intermediate (i) and rapid (r) neutron capture processes. While the s-process terminates its heavy element production at Pb-208, we know that the r-process or i-process must be capable of going beyond since we observe long-lived actinides like U-238 in stars and traces of Cm-247 in meteorites. However, which astrophysical site(s) are responsible for actinide production, and exactly how heavy each nucleosynthesis process can ultimately reach remains unclear. Utilizing metal-poor stars rich in r-process elements, we will explore recent work that has suggested signatures of fission fragments of isotopes with A~260 to be observed. I will also discuss a recent application of machine learning to decipher metal-poor star abundance patterns. Further, we will discuss the utility of MeV gamma-rays, in particular a 2.6 MeV emission line of Tl-208 that could be used to hunt locally for in situ neutron capture nucleosynthesis from both i-process and r-process sources. I will also discuss the opportunity to refine our understanding through measurements at radioactive isotope beam facilities in the near future, such as constraints on neutron captures along the Tl isotopic chain. It is via studies such as these, which work to combine the current picture of leading astrophysical candidates with carefully considered nuclear data, that the big picture of heavy element origins can be teased out.
04 Apr

The Spallation Neutron Source Accelerator

04 April 2025 - 3:00 PM
Online via Zoom
Oak Ridge National Laboratory

John Mammosser

Show/Hide Abstract
TBD
06 Apr

Advanced Studies Gateway public talk by Jocelyn Read: Discovering the Universe of Gravitational Waves

06 April 2025 - 1:00 PM
Online via Zoom
California State University, Fullerton

Jocelyn Read

Show/Hide Abstract
Gravitational waves are tiny ripples in the fabric of spacetime that travel to us from some of the most extreme events in our Universe, distant mergers of black holes and neutron stars. Observations of these events chart the history of stars through the collapsed remnants that are left behind at the end of their lives. Interpreting the patterns of their waves tells us about how these compact remnants orbit and spin, and can tell us how matter behaves at densities beyond that of an atomic nucleus. Mergers involving neutron stars are engines of transient astronomy, launching gamma-ray bursts and spreading newly created heavy elements into the universe. In this talk, I will tell some of the story of this new field of gravitational wave astronomy and show how our first detections are laying the groundwork for future observatories that can see across our entire Universe. Jocelyn Read is a Professor of Physics at California State University Fullerton in the Nicholas and Lee Begovich Center for Gravitational Wave Physics and Astronomy, and currently a Visiting Fellow at the Perimeter Institute. Her research connects the nuclear astrophysics of neutron stars with gravitational wave observations. She earned her Ph.D. in 2008 from the University of Wisconsin Milwaukee, where she developed a widely used model for dense matter inside neutron stars and produced first estimates of how gravitational waves from neutron star mergers would inform these properties. Her work has included proposed mechanisms for precursor flares in gamma-ray bursts, new methods for gravitational-wave cosmology, uncertainty quantification for neutron-star merger source modeling, and measurements of dense matter properties with LIGO and Virgo gravitational-wave observations. She is actively contributing to the development of the next-generation gravitational-wave observatory Cosmic Explorer. Read co-chaired the LIGO/Virgo Binary Neutron Star Sources Working Group from 2014 to 2016 and was part of the team awarded the 2016 Special Breakthrough Prize in Fundamental Physics for the discovery of gravitational waves. She co-led the Extreme Matter team of the LIGO-Virgo-Kagra Collaboration from 2016 to 2022, through the first discovery and analysis of gravitational waves from a neutron-star merger. She has held visiting positions at the California Institute of Technology and the Carnegie Observatories in Pasadena. Read chairs the Advisory Board for the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) and served on the Scientific Advisory Committee for the Australian Research Council Centre of Excellence for Gravitational Wave Discovery (OzGrav). She was elected a Fellow of the American Physical Society (APS) in 2019.
09 Apr

Development of new isotopes for theranostic applications

09 April 2025 - 3:30 PM
1300 FRIB Laboratory and Online via Zoom
University of Alabama at Birmingham

Suzanne Lapi

Show/Hide Abstract

The theranostic concept where similar or identical radiopharmaceuticals are used for tandem imaging and therapeutic strategies has been paradigm shifting for the field of nuclear medicine. The theranostic isotope pairing in FDA approved radiopharmaceuticals typically consists of two different radionuclides, for example 68Ga for imaging and 177Lu for therapy. A disadvantage of using this pair is that 68Ga and 177Lu are chemically different, which may result in different pharmacokinetics of radiopharmaceuticals labelled with these two compounds.  The ideal theranostic pair would include radioisotopes of the same element (isotope pairs) but with different emissions (i.e., one suitable for diagnosis and the other for therapy). To this end, our group has focused on the production of 43Sc and 47Sc as a true matched theranostic pair for imaging and therapy as well as methods for production of 203Pb as an imaging analogue for the therapeutic isotope 212Pb.   More recent work has focused on imaging analogues of F-block radionuclides including 155Tb and 140Nd, Additional research has developed chemistry to incorporate these radioisotopes into new imaging radiopharmaceuticals for preclinical and eventually clinical imaging studies. 

11 Apr

Nuclear reactions for Astrophysics and the opportunity of indirect methods

11 April 2025 - 2:00 PM
2025 FRIB Laboratory and Online via Zoom
INFN LNS, Italy

Marco La Cognata

Show/Hide Abstract
Nuclear reactions among charged particles in stars take place at energies generally well below the Coulomb barrier, so the Coulomb barrier penetration factor exponentially suppresses the cross sections down to values as small as few nanobarns or picobarns. Therefore, approaching astrophysical energies opens new challenges and calls for new approaches. I will introduce the mission of nuclear astrophysics and discuss how experiments are usually conducted. Then, I will focus on the use of indirect methods as complementary approaches to direct measurements, discussing in detail the asymptotic normalization coefficient (ANC) and the Trojan Horse Method (THM). These methods are used to deduce the astrophysical factors of reactions with photons and charged particles in the exit channel, respectively, with no need of extrapolation. I will present recent results of the application of the two methods as examples. First, I will discuss the 6Li(3He,d)7Be measurement used to deduced the ANC’s of the 3He+4He->7Be and p+6Li->7Be channels and the corresponding radiative capture astrophysical factors. Then, I will illustrate the THM measurement of the 27Al(p,a)24Mg astrophysical factor through the 2H(27Al,a24Mg)n reaction. The reaction rate of the 27Al(p,g)28Si reaction was also deduced thanks to the determination of the proton partial widths. Both the ANC and the THM applications made it possible to assess the occurrence or exclude the presence of resonances that could be responsible significant changes of the reaction rates at temperatures of astrophysical interest.
11 Apr

Advanced Studies Gateway Mezzo-Soprano Recital: "Fine: The End"

11 April 2025 - 5:30 PM
1300 FRIB Laboratory
Show/Hide Abstract
Program: Soirées musicales (Gioachino Rossini, 1792-1868) - La pastorella dell’Alpi - Il rimprovero - L’invito Sieben Frühe Lieder (Alban Berg, 1885-1935) - Nacht - Schilflied - Die Nachtigall - Traumgekrönt - Im Zimmer - Liebesode - Sommertage Intermission Mélodies persanes, Op. 26 (Saint Saëns, 1810-1849) - La Brise - La Splendeur vide - La solitaire A tí (Jaime León, 1921-2015) Sabor a mí (Alvaro Carrillo, 1921-1969) Júrame (Maria Grever, 1885-1951) Paula Duva-Rodriguez is a Colombian American mezzo-soprano pursuing her Masters of Music in the studio of Jane Bunnell at Michigan State University (MSU). Ms. Duva-Rodriguez recently completed her final opera at MSU, singing the title role of La Cenerentola. Ms. Duva-Rodriguez first gained notice for her “warm and powerful voice” backed by her “Chaplinesque” performance as Ramiro in La finta giardiniera (MSU Opera Theatre). Other roles in Ms. Duva-Rodriguez’s repertory include Donna Elvira in Don Giovanni, Mrs. Segstom in A Little Night Music, La tasse chinoise/La libellule in L’enfant et les sortilèges, Nancy in Albert Herring, Dritte Dame in Die Zauberflöte, and Cherubino in Act II of Le nozze di Figaro. Concert repertory includes Alto Soloist positions for Handel’s Messiah, (Great Lakes Chamber Orchestra), Schubert’s Magnificat (GLCO), Rutter’s Gloria (People’s Church of East Lansing) and Haydn’s Missa in tempore belli (PCEL). Ms. Duva-Rodriguez was also a recipient of the Mezzo-Soprano Prize, sponsored by Hilda Harris at the 2024 George Shirley competition. Ms. Duva-Rodriguez dabbles in other music adventures, having been a vocalist for MSU’s salsa band Salsa Verde and a jazz combo vocalist at MSU, along with having played saxophone for several years. Paula Duva-Rodriguez completed her Bachelor of Music and Bachelor of Arts in English at Michigan State University.
25 Apr

Beautiful Melting: The dissolving of beauty-antibeauty states in the Quark-Gluon Plasma.

25 April 2025 - 6:30 PM
Online via Zoom
UC Davis

Manuel Calderon

Show/Hide Abstract
A Quark-Gluon Plasma is the state of matter that existed a millionth of a second after the Big Bang. The temperatures were about a million times hotter than that of our sun. At these extremely hot temperatures, atoms and nuclei melt into a soup of quarks and gluons. We can study this state in modern accelerators by colliding heavy nuclei, such as gold or lead, at ultrarelativistic energies. One way to study this plasma is by studying its effect on particles made of a heavy quark-antiquark pair. The heaviest of these are states made of b and anti-b quarks, sometimes called "beauty" quarks. In this talk, we will summarize measurements taken over the past 15 years, we have studied these particles as they experience the hot environment of the Quark-Gluon Plasma, where we have found that these particles essentially melt when they are placed in this extreme environment. Manuel Calderón de la Barca Sánchez is from Mexico City. He went to high-school and college in at the Tec de Monterrey, majoring in Engineering Physics. He spent a summer doing research at CERN through a fellowship from the Mexican Physical Society. Thanks to this he continued on to graduate school to pursue his Ph.D, joining the relativistic heavy-ion group at Yale University, where he completed his PhD in 2001 in the field of high-energy nuclear physics. His work was done at the Relativistic Heavy-ion Collider at Brookhaven National Laboratory, where he was first a postdoc and then a staff scientist. His desire to teach led him to look for University positions, and he was hired as Assistant Professor at Indiana University in 2004, and then at UC Davis in 2006, where he is now full professor. He is the featured scientist and narrator of the IMAX film, “Secrets of the Universe”, which explores how scientists study the quark soup that existed a millionth of a second after the Big Bang. He is an enthusiastic educator, receiving the UC Davis Distinguished Teaching Award for Undergraduate Teaching in 2013. He is committed to increasing diversity in STEM: as a member of the UC Davis Strength Through Equity and Diversity (STEAD) Committee, he received the “Soaring to New Heights” Faculty Citation Award for Diversity and Principles of Community, highlighting outstanding efforts to increase diversity. He is a member of the Nuclear Science Advisory Committee. He continues to do research at Brookhaven Lab, and at CERN in the Large Hadron Collider focusing on b-quark bound states and Z bosons. He has continued to open opportunities for Latinos and women to be involved in the STEM fields in general, and in Physics in particular.
11 May

Nuclear Science Summer School

11 May 2025 - 8:30 AM
1221A and 1221B FRIB Laboratory
Show/Hide Abstract
The Nuclear Science Summer School (NS3) is a summer school that introduces undergraduate student participants to the fields of nuclear science and nuclear astrophysics. NS3 is hosted by FRIB on the campus of Michigan State University (MSU). The school will offer lectures and activities covering selected nuclear science and astrophysics topics.
20 Jul

Physics of Atomic Nuclei (PAN)

20 July 2025 - 8:00 AM
1221A and 1221B FRIB Laboratory
Show/Hide Abstract

PAN introduces participants to the fundamentals of the extremely small domain of atomic nuclei and its connection to the extremely large domain of astrophysics and cosmology.

The PAN @ Michigan State Experience

  • Learn about research in one of the top rare-isotope laboratories in the world.
  • Get introduced to the fascinating fields of astrophysics, precision measurement, and nuclear science.
  • Perform your own nuclear physics experiments.
  • Meet researchers who are exploring a wide array of questions.
  • Discover the surprising array of career opportunities in science.
  • Experience the atmosphere of college life.
  • Participants in the 2024 program get free room and board on campus (if required).

Events