Lawrence Livermore National Laboratory

Staff of Livermore's NSSC Program


Adam Bernstein

Adam develops radiation detectors for applications in nuclear nonproliferation and nuclear arms control, and also focuses on detector development for fundamental physics experiments. (Email:





Lee Bernstein

Lee's research involves measuring properties that determine nuclear reaction rates in environments ranging from nuclear reactors to laser-driven plasmas to exploding stars. In addition, he has been the intellectual leader of a number of programs carried out by the Bay Area Neutron Group (BANG). He has developed and taught a course on nuclear physics in high-energy-density plasmas at the University of California at Berkeley, and is currently teaching the upper-level undergraduate nuclear physics course there. He is also leading the effort to develop a nuclear data compilation program utilizing Berkeley students in collaboration with scientists at Lawrence Berkeley National Laboratory. (Email:



Darren Bleuel

Darren’s current research includes studying the effects of high-energy-density plasmas on nuclear reactions at the National Ignition Facility and other high-power laser facilities, developing a neutron irradiation facility at Lawrence Berkeley National Laboratory, measuring photon strength and nuclear-level densities, characterizing neutron and photon detectors, measuring nuclear cross sections and neutron spectra with time-of-flight and activation techniques, and conducting neutronics modeling for national security applications. (Email:




Nathaniel Bowden

Nathaniel focuses on the development of efficient and practical technologies for antineutrino detection and fast neutron imaging and spectrometry. In addition to addressing open questions in the field of neutrino physics, he is particularly interested in the application of these technologies to nuclear nonproliferation, nuclear materials safeguards, and treaty verification. (Email:




Jason Burke

Jason performs accelerator and tabletop-based low-energy nuclear physics experiments. His primary research focuses on groundbreaking research developing the surrogate reaction method in preparation for future experiments at the Facility for Rare Isotope Beams in Michigan. His research interests also include nuclear–atomic coupling physics, nuclear excitation by electron capture and nuclear excitation by electron transition studies, and development of the world's first nuclear clock. (Email:



Nerine Cherepy

Nerine develops new scintillator materials and instrumentation for gamma ray spectroscopy and radiographic imaging. Her projects include SrI2(Eu) detectors that optimize light collection efficiency, Ce-activated transparent ceramic garnets with Si-photodetector readout, Eu-doped Gd–Lu bixbyite transparent ceramics for radiographic imaging, and new high-Z polymer scintillators that offer gamma ray spectroscopy. (Email:




Steven Dazeley

Steven's research interests include neutrino oscillation physics and nonproliferation technologies. On the neutrino side, he has worked on KamLAND and Super-k in Japan, then later at the Double Chooz experiment in France. At LLNL, he contributed to the application of neutrino detection to nonproliferation, working on the SONGS antineutrino deployment at San Onofre in California, and currently on the WATCHMAN joint nonproliferation project to deploy a kiloton-scale, gadolinium-doped water Cherenkov detector. He is also developing a water Cherenkov-based neutron multiplicity detector using similar techniques. (Email:




Stephan Friedrich

Stephan develops superconducting x-ray and gamma-ray detectors that operate at temperatures close to absolute zero to achieve an energy resolution 10× higher than conventional semiconductor detectors. His group builds and optimizes the refrigerators, detectors, and readout systems to increase detector resolution, speed, and sensitivity. They also use these detectors for high-accuracy isotope analysis of nuclear samples at LLNL, and for high-resolution x-ray spectroscopy of novel materials at synchrotrons. (Email:




Annie Kersting

Annie's research interests include the fields of radiochemistry, isotope geochemistry, and environmental chemistry. Her current research focuses on the geochemical mechanisms that control actinide transport in the soil and groundwater. In particular, she is interested in understanding how nanoparticles facilitate transport of contaminants in both the saturated and unsaturated environment. (Email:




Kim Knight

Kim focuses on nuclear forensics, the development of laser-based resonance ionization mass spectrometry techniques, elemental and isotopic record in presolar grains, stellar condensation, early solar system conditions, early solar system chronology, argon geochronology, and the timing and evolution of large igneous provinces. (Email:




Mike Kristo

Mike's research is in nuclear forensics, inorganic mass spectrometry, secondary ion mass spectrometry, surface analysis, elemental and molecular imaging, nuclear processes, and biomaterials. (Email:





Vladimir Mozin

Vladimir's present research interests revolve around developing computational and experimental methods to investigate nondestructive assay techniques for nuclear safeguards applications. He was previously employed as a radiochemical engineer at a spent nuclear fuel reprocessing facility. He received a Ph.D. in nuclear engineering at the University of California at Berkeley, and an M.S. in radioactive isotopes chemistry at the Moscow Institute of Physics and Engineering. (Email:



Steve Payne

Steve's research encompasses radiation detectors (scintillators, semiconductors, gamma, and neutron), lasers materials, optics, basic physics, and chemistry. (Email:






Sofia Quaglioni

Sofia performs first principles (or, ab initio) calculations of light nuclei. Her goal is to accurately describe both the structure (bound, excited states, narrow resonances) of light nuclei and, most importantly, their reactions in thermonuclear environments (such as in stellar interiors or at terrestrial fusion facilities), starting from the nucleon degrees of freedom and accurate nuclear interactions among them. Dr. Quaglioni's present research interest revolve around the development of theoretical and computational tools to reach a fundamental description of light-ion fusion reactions important for astrophysics modeling and fusion energy applications, such as the ab initio no-core shell model / resonating-group method (NCSM/RGM). (Email:



Nicholas Scielzo

Nicholas performs accelerator-based experiments to improve the nuclear data needed for both fundamental (nucleosynthesis, nuclear structure) and applied (nuclear energy, homeland security, stockpile stewardship) nuclear sciences. His current research is focused on developing novel ion trap techniques for high-precision measurements of nuclear decay properties and studying neutron-induced reactions on short-lived isotopes. (Email:




Dawn Shaughnessy

Dawn studies the nuclear and chemical properties of actinides, transactinides, and superheavy elements; fission properties; target preparation and radiochemical separation techniques; rapid heavy element atom-at-a-time chemistry; and the behavior of radioactive contaminants in the environment. (Email:




Mark Stoyer

Mark's research focuses on inertial confinement fusion at NIF, radiochemical diagnostics, prompt gamma-ray spectroscopy, nuclear structure physics, high-spin physics, radioactive ion beam physics, nuclear cross-section measurements, actinide target preparation, heavy element synthesis, and nuclear reaction mechanisms. (Email:




Scott Tumey

Scott works at the Center for Accelerator Mass Spectrometry where he leads and conducts research in the development and application of accelerator mass spectrometry to heavy elements (including long-lived transition metal isotopes, I-129, Sr-90, and U and Pu isotopes) to solve problems in national security, nuclear forensics, and environmental applications. (Email:




Mavrik Zavarin

Mavrik works in environmental radiochemistry, actinide chemistry, the surface complexation modeling of contaminant–mineral interactions, and reactive transport modeling. (Email: