Tashi Parsons-Davis

Staff Scientist
Nuclear and Chemical Sciences Division
Email: parsonsdavis1@llnl.gov
Phone: +19254232304


  • Ph.D., Chemistry, University of California, Berkeley, 2014
  • B.S., Chemistry, Mills College, 2006


Tashi Parsons-Davis completed her doctorate work in the heavy element nuclear and radiochemistry group at UC Berkeley, where her dissertation research focused on sorption, redox, and complexation interactions of aqueous plutonium and other f-elements with porous solid materials. She joined LLNL in November 2014 as a postdoctoral researcher in the Chemical & Isotopic Signatures group, where she assumed responsibility for the application of gamma and alpha spectroscopies, and other radiometric measurements, to nuclear forensics and historic nuclear fallout research. After transitioning to a staff scientist position at LLNL, she continued in this role and expanded it to contribute to projects related to nuclear safeguards, international engagement, and various aspects of nuclear forensics.

Parsons-Davis has continued her studies of fundamental aqueous plutonium chemistry and has ongoing research interests in fundamental actinide chemistry as well as the environmental transport and behavior of radionuclides. She also developed skills and interest in radionuclide metrology through her efforts to verify high-precision decay constants for uranium isotopes. Parsons-Davis enjoys radiochemical separations, electrochemistry, and the preparation of standards, counting sources, and nuclear targets.

Selected Publications

  1. Tashi Parsons-Davis, Kim Knight, Marc Fitzgerald, Gary Stone, Lee Caldeira, Christina Ramon, and Michael Kristo, Application of Modern Autoradiography to Nuclear Forensic Analysis, Forensic Science International, In Press, doi: 10.1016/j.forsciint.2018.03.027, (2018).
  2. L. Lakosi, J. Zsigrai, A. Kocsonya, T.C. Nguyen, H. Ramebäck, T. Parsons-Moss, N. Gharibyan, and K. Moody, Gamma Spectrometry in the ITWG CMX-4 Exercise, Journal of Radioanalytical and Nuclear Chemistry 315, 409–416, doi: 10.1007/s10967-017-5667-2, (2018).
  3. Tashi Parsons-Moss, Stephen Jones, Jinxiu Wang, Eva Uribe, Dongyuan Zhao, and Heino Nitsche, Reduction of plutonium in acidic solutions by mesoporous carbons, Journal of Radioanalytical and Nuclear Chemistry 307 (3), 2593–2601, doi: 10.1007/s10967-015-4647-7, (2016).
  4. Tashi Parsons-Moss, Jinxiu Wang, Stephen Jones, Erin May, Daniel Olive, Zurong Dai, Mavrik Zavarin, Annie B. Kersting, Dongyuan Zhao, and Heino Nitsche, Sorption Interactions of Plutonium and Europium with Ordered Mesoporous Carbon, Journal of Materials Chemistry A 2, doi: 10.1039/C4TA01740D, (2014).
  5. Tashi Parsons-Moss, Harun Tüysüz, Deborah Wang, Stephen Jones, Daniel Olive, and Heino Nitsche, Plutonium Sorption to Nanocast Mesoporous Carbon, Radiochimica Acta 102 (4), doi: 10.1515/ract-2014-2138, (2014).
  6. Mazhar N. Ali, Mitch A. Garcia, Tashi Parsons-Moss, and Heino Nitsche, Polymer-Assisted Deposition of Homogeneous Metal Oxide Films to Produce Nuclear Targets, Nature Protocols 5 (8), 1440–1446, doi: 10.1038/nprot.2010.105, (2010).
  7. Garcia MA, Ali MN, Chang NN, Parsons-Moss T, Ashby PD, Gates JM, Stavsetra L, Gregorich KE, and Nitsche H., Metal oxide targets produced by the polymer-assisted deposition method, Nuclear Instruments and Methods in Physics Research A 613, 396–400, doi: 10.1016/j.nima.2009.09.084 (2010).
  8. Gates JM, Stavsetra L, Sudowe R, Ali MN, Calvert MG, Dragojević I, Dvorak J, Dvorakova Z, Ellison PA, Garcia MA, Gregorich KE, Nelson SL, Parsons-Moss T, and Nitsche H., Extraction of niobium and tantalum isotopes using organophosphorus compounds. Part II - Extraction of “carrier-free” concentrations from HCl/LiCl solutions Radiochimica Acta 97, 173–176. doi: 10.1524/ract.2009.1584 (2009).
  9. Gates JM, Sudowe R, Stavsetra L, Ali M, Calvert MG, Dragojević I, Ellison PA, Garcia MA, Gharibyan N, Gregorich KE, Nelson SL, Neumann SH, Parsons-Moss T, and Nitsche H., Extraction of niobium and tantalum isotopes using organophosphorus compounds – Part I – Extraction of ‘carrier-free’ metal concentrations from HCl solutions, Radiochim Acta 97, 167–172, doi: 10.1524/ract.2009.1583 (2009).
  10. Mitch A. Garcia, Mazhar N. Ali, Tashi Parsons-Moss, Paul D. Ashby, and Heino Nitsche, Metal Oxide Films Produced by Polymer-Assisted Deposition (PAD) for Nuclear Science Applications, Thin Solid Films 516, (18), 6261–6265, doi: 10.1016/j.tsf.2007.11.127, (2008).
  11. Garcia MA, Ali MN, Chang NN, Parsons-Moss T, Ashby PD, Gates JM, Stavsetra L, Gregorich KE, and Nitsche H., Heavy-ion irradiation of thulium(III) oxide targets prepared by polymer-assisted deposition, Nuclear Instruments and Methods in Physics Research A 592, 483–485, doi: 10.1016/j.nima.2008.04.077.