Stephanie Lyons is a physicist in the Signature Sciences and Technology Division. Lyons’ research focuses on radiation detection, and she applies her expertise across a variety of mission spaces, from nuclear astrophysics to nuclear nonproliferation.

Lyons received her PhD in physics from the University of Notre Dame in 2016. She joined Pacific Northwest National Laboratory (PNNL) in 2019, after her a postdoctoral fellowship at the National Superconducting Cyclotron Laboratory at Michigan State University. As a postdoc, Lyons led several experiments for the β-Oslo Collaboration and was the principal investigator for an expansion of the indirect cross section measurement technique for reactions on proton-rich nuclei.

Lyons is a member of the Facility for Rare Isotope Beams (FRIB) User Organization and serves on the FRIB Decay Station Total Absorption Spectroscopy Working Group. She previously served as co-chair for Prism, PNNL’s Employee Resource Group for LGBTQ+ staff and allies, and currently serves as U.S. delegate for the International Conference for Women in Physics.

Disciplines and Skills

  • Nuclear Physics
  • Radiation Detection Equipment
  • Liquid Scintillation Detection
  • Simulation/Modeling


  • Doctor of Philosophy, Physics, University of Notre Dame
  • Master of Science, Physics, University of Notre Dame
  • Bachelor of Science, Physics, Randolph-Macon Woman's College

Affiliations and Professional Service

  • Facility for Rare Isotope Beams User Organization Committee Member
  • U.S. delegate for the International Conference for Women in Physics



D. Mücher, A. Spyrou, M. Wiedeking, M. Guttormsen, AC Larsen, F. Zeiser et al., “Extracting model-independent nuclear level densities away from stability” Physical Review C 107: 1 (2023) L011602.


H. Schatz, A.D. Becerril-Reyes, et al., “Horizons: nuclear astrophysics in the 2020s and beyond.” Journal of Physics G: Nuclear and Particle Physics 49, 11 (2022) 110502.

M.E. Moore, J. Latta, L. Snyder, B.G. Fulsom, U. Greife, S.M. Lyons, L.S. Wood, D.L. Duke, et al., “Stopping Force Analysis of 235U Elemental Fission Product Yields for En= 0.11–92.4 MeV,” Nuclear Data Sheets 184 (2022).

M.L. di Vacri, I.J. Arnquist, H.O. Back, M. Bliss, M. Bronikowski, E. Edwards, B.R. Hackett, E.W. Hoppe, S.M. Lyons, N.D. Rocco et al. “Identification of background limitations to ultra-sensitive LSC counting through ICP-MS assay of LSC cocktails,” Journal of Radioanalytical and Nuclear Chemistry 331, 12 (2022) p. 5597-5604.


P. Gastis, G. Perdikakis, G.P.A. Berg, A.C. Dombos, A. Estrade, A. Falduto, M. Horoi, S.N. Liddick,
S. Lipschutz, S.M. Lyons, et al. “A technique for the study of (p, n) reactions with unstable isotopes at energies relevant to astrophysics,” Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 985 (2021) 164603.

C.F. Persch, P.A. DeYoung, S.M. Lyons, A. Spyrou, S.N. Liddick, F. Naqvi, B.P. Crider, A.C. Dombos, et al., “β-decay feeding intensity distributions of 71,73Ni,” Physical Review C 103 5(2021) 55808.

C.A. Lani, B.P. Pierson, S.M. Lyons, M. Flaska. “Optimization Simulations for a Gamma-Ray Calibration Standard for a Cyclic Neutron Activation Analysis Pneumatic System at the Penn State Breazeale Reactor” 2021 IEEE Nuclear Science Symposium and Medical Imaging Conference (2021).


W-J. Ong, E.F. Brown, J. Browne, S. Ahn, K. Childers, B.P. Crider, A.C. Dombos, S.S. Gupta, et al., “β Decay of 61V and its Role in Cooling Accreted Neutron Star Crusts,” Physical Review Letters 125: 26 (2020) 262701.

A. Lennarz, M. Williams, A.M. Laird, U. Battino, A.A. Chen, D. Connolly, B. Davids, N. Esker, R. Garg, et al., “First inverse kinematics measurement of key resonances in the 22Ne(p, γ)23Na reaction at stellar temperatures,” Physics Letters B 807 (2020) 135539.

Q. Liu, M. Febbraro, R.J. DeBoer, S. Aguilar, A. Boeltzig, Y. Chen, M. Couder, J. Görres, E. Lamere,
S. Lyons, et al., “Low-energy cross-section measurement of the 10B(α, n)13N reaction and its impact on neutron production in first-generation stars,” Physical Review C 101 (2020) 25808.




A.C. Dombos, A. Spyrou, F. Naqvi, S.J. Quinn, S.N. Liddick, A. Algora, T. Baumann, B.J. Thomas; et al., “β-decay half-lives of neutron-rich nuclides in the A= 100–110 mass region,” Physical Review C 99 (2019) 15802.

S.M. Lyons, A. Spyrou, S.N. Liddick, F. Naqvi, B.P. Crider, A.C. Dombos, D. Bleuel, B.A. Brown, A. Couture, et al., “69,71Co β-decay strength distributions from total absorption spectroscopy” Physical Review C 100 (2019) 25806.


S.M. Lyons, J. Görres, R.J. deBoer, E. Stech, Y. Chen, G. Gilardy, Q. Liu, A.M. Long, M. Moran,
D. Robertson, et al., “Determination of 20Ne(p, γ)21Na cross sections from Ep= 500− 2000 keV,” Physical Review C 97 (2018) 65802.