Lawrence Livermore National Laboratory



Christopher Ryan

Staff Scientist
Nuclear and Chemical Sciences Division


 +1 925-423-5091


DegreeDiscipline/InstitutionYear
M.S. Nuclear Engineering
Texas A&M University
2011
B.S. Nuclear Engineering
Texas A&M University
2007

Research Interests

  • Investigating new analytical techniques for post-detonation nuclear forensics
  • Maximizing the usefulness of historical nuclear test data for the stockpile stewardship mission
  • Exploitation of new and unique signatures for all-source intelligence analysis

Honors and Awards

  • LLNL Global Security Directorate Silver Award, 2014
  • LLNL Physical and Life Sciences Directorate Spot Award, 2014
  • NNSA Defense Programs Award of Excellence, 2013

Selected (Recent) Publications

  1. C. Bhatia, B. F. Fallin, M. E. Gooden, … C. M. Ryan, … A. P. Tonchev, "Exploratory study of fission product yields of neutron-induced fission of 235U, 238U, and 239Pu at 8.9 MeV," Phys. Rev. C, 91, 064604 (2015).
    http://dx.doi.org/10.1103/PhysRevC.91.064604
  2. C. Bhatia, B. F. Fallin, M. E. Gooden, … C. M. Ryan, … A. P. Tonchev, "Dual-Fission Chamber and Neutron Beam Characterization for Fission Product Yields Using Monoenergetic Beams," Nucl. Instrum. Meth. A, 757, 4-19 (2014).
    http://dx.doi.org/10.1016/j.nima.2014.03.022
  3. C. M. Ryan, C. M. Marianno, W. S. Charlton, A. A. Solodov, R. J. Livesay, and B. Goddard, "Predicting Concrete Roadway Contribution to Gamma-Ray Background in Radiation Portal Monitor Systems," Nucl. Technol., 186, 3, 415-426 (2014).
    http://dx.doi.org/10.13182/NT13-98
  1. C. Bhatia, B. F. Fallin, C. R. Howell, … C. M. Ryan, … A. P. Tonchev, "Fission Product Yield Study of 235U, 238U, and 239Pu Using Dual-Fission Ionization Chambers," Nucl. Data Sheets, 119, 324-327 (2014).
    http://dx.doi.org/10.1016/j.nds.2014.08.089
  2. C. M. Ryan, C. M. Marianno, W. S. Charlton, and W. D. James, "Neutron activation analysis of concrete for cross-border nuclear security," J. Radioanal. Nucl. Chem., 291, 1, 267-272 (2012).
    http://dx.doi.org/10.1007/s10967-011-1272-y
  3. C. M. Ryan, "Determining the Impact of Concrete Roadways on Gamma Ray Background Readings in Radiation Portal Monitoring Systems," M. S. Thesis, Texas A&M University Office of Graduate Studies, May 2011.
    http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9341

Last update: