Lawrence Livermore National Laboratory



John Despotopoulos

Staff Scientist
Nuclear and Chemical Sciences Division


 +1 925-422-7146


DegreeDiscipline/InstitutionYear
PhD Radiochemistry
University of Nevada, Las Vegas
2015
BS Chemistry
University of Oregon
2010

Background

John Despotopulos obtained a BS in Chemistry from the University of Oregon in the fall of 2010 and started graduate school in the Radiochemsitry PhD program at the University of Nevada, Las Vegas in the fall of 2010. He became a Lawrence Graduate Scholar in 2013, finishing his PhD in radiochemistry while working at LLNL. After receiving his PhD, he continued working at LLNL as a postdoctoral scholar in the Nuclear and Chemical Sciences Division and became a staff scientist in September 2017.

Despotopulos’s research interests include separation methods for chemical investigation of the transactinides, development of National Ignition Facility (NIF) capsule target doping methods, rapid radiochemical separations, and investigation of macrocyclic compounds for use as highly selective extractants. His current research focuses on using thiacrown ethers as novel extractants for investigating the chemical properties of element 112 (copernicium, Cn) and element 114 (flerovium, Fl). A separate project uses microinjection techniques to add radioactive materials to the inner surface of NIF capsules.

Honors and Awards

  • Livermore Graduate Scholar, LLNL (2013-2015)

Selected Publications

Despotopulos, J. D., Kmak, K. N., Moody, K. J., Shaughnessy, D. A. “Development of a 212Pb and 212Bi generator for homolog studies of flerovium and moscovium.” J. Radioanal. Nucl. Chem. (2018), doi: 10.1007/s10967-018-5848-7.

Despotopulos, J. D., Kmak K. N., Gharibyan N., Henderson R. A., Moody K. J., Shaughnessy D. A., Sudowe R. “Characterization of the homologs of flerovium with crown ether based extraction chromatography resins: studies in hydrochloric acid.” J. Radioanal. Nucl. Chem. 310:1201–1207 (2016).

Despotopulos, J. D., Kmak K. N., Gharibyan N., Henderson R. A., Moody K. J., Shaughnessy D. A., Sudowe R. “Characterization of the homologs of flerovium with crown ether based extraction chromatography resins: studies in nitric acid.” J. Radioanal. Nucl. Chem. 311:649–653 (2017).

Despotopulos, J. D., Kmak K. N., Gharibyan N., Brown T. A., Grant P. M., Henderson R. A., Moody K. J., Tumey S. J., Shaughnessy D. A., Sudowe R. “Production and isolation of carrier-free homologs of flerovium and element 115 at the Lawrence Livermore National Laboratory Center for Accelerator Mass Spectrometry.” J. Radioanal. Nucl. Chem. (2015), doi: 10.1007/s10967-015-4500-z.

Despotopulos, J. D., Gostic, J. M., Bennett, M. E., Gharibyan, N., Henderson, R. A., Moody, K. J., Sudowe, R., Shaughnessy, D. A. “Characterization of Group 5 dubnium homologs on diglycolomide extraction chromatography resins from nitric and hydrofluoric acid matrices.” J. Radioanal. Nucl. Chem. (2014), doi: 10.1007/s10967-014-3398-1.


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