Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Donivan R. Porterfield"'
Autor:
Khalil J. Spencer, Floyd E. Stanley, Jung H. Rim, Ning Xu, Mariam R. Thomas, Kevin J. Kuhn, Christopher G. Worley, Holly R. Trellue, Elmer Lujan, Katherine Garduno, Lav Tandon, Donivan R. Porterfield
Publikováno v:
Forensic Science International. 273:e1-e9
Nuclear forensics techniques, including micro-XRF, gamma spectrometry, trace elemental analysis and isotopic/chronometric characterization were used to interrogate two, potentially related plutonium metal foils. These samples were submitted for analy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6bd30e5696b8a15667ca4f8387d88fcb
https://doi.org/10.1016/j.forsciint.2017.01.014
https://doi.org/10.1016/j.forsciint.2017.01.014
Autor:
Elmer Lujan, Lisa E Townsend, Lav Tandon, Kevin J. Kuhn, Alexander Martinez, Keller Ra, Lynn A. Foster, Donivan R. Porterfield, Mariam R. Thomas, Khal Spencer, Daniel S. Schwartz, Ning Xu, Lisa Michelle Colletti, Floyd E. Stanley, Benjamin L. Byerly
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 312:95-104
Thorough physical and chemical characterization of plutonium–beryllium (PuBe) neutron sources is an important capability with applications ranging from material accountancy to nuclear forensics. Characterization of PuBe sources is not trivial owing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::499a770e4edd42a5b60a1b7e6d86ea78
https://doi.org/10.1007/s10967-017-5192-3
https://doi.org/10.1007/s10967-017-5192-3
Autor:
K. J. Mathew, Ross W. Williams, Joanna S. Denton, Mariam R. Thomas, Floyd E. Stanley, Tara Mastren, Adrian Nicholl, Andrew J. Gaunt, Keller Ra, Tashi Parsons-Davis, Katherine Garduno, Amy M. Gaffney, William S. Kinman, Josh Wimpenny, Theresa M. Kayzar-Boggs, Klaus Mayer, James Brent Fulwyler, R. E. Steiner, Zsolt Varga, Dana Labotka, Allison Wende, Joel R. Maassen, Jung Rim, Maria Wallenius, Richard A. Torres, Elmer Lujan, Lav Tandon, Kerri C. Treinen, Iain May, John M. Rolison, Donivan R. Porterfield, Chelsea Ottenfeld, J. D. Inglis
Publikováno v:
Analytical chemistry. 91(18)
An intercomparison of the radio-chronometric ages of four distinct plutonium-certified reference materials varying in chemical form, isotopic composition, and period of production are presented. The cross-comparison of the different 234U/238Pu, 235U/
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c2e9684d4ead630e284aa8720e7a7eba
https://pubmed.ncbi.nlm.nih.gov/31418542
https://pubmed.ncbi.nlm.nih.gov/31418542
Autor:
Ning Xu, Russell C. Keller, Mariam R. Thomas, Steve Charles Myers, Jamie L. Doyle, Laurie F. Walker, Alexander Martinez, Benjamin L. Byerly, Elmer Lujan, Donivan R. Porterfield, Katherine Garduno, Lav Tandon, James Brent Fulwyler, Khalil J. Spencer, Floyd E. Stanley, Lisa Michelle Colletti, Kevin J. Kuhn, Lisa E Townsend
Publikováno v:
Talanta. 159:200-207
Nuclear forensic publications, performance tests, and research and development efforts typically target the bulk global inventory of intentionally safeguarded materials, such as plutonium (Pu) and uranium (U). Other materials, such as neptunium (Np),
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f52f155c43bcffd82d0301809dda9ab
https://doi.org/10.1016/j.talanta.2016.06.028
https://doi.org/10.1016/j.talanta.2016.06.028
Autor:
Jung Rim, Katherine Garduno, Ning Xu, Lisa Michelle Colletti, Kevin J. Kuhn, Donivan R. Porterfield, Mariam R. Thomas, Alexander Martinez, Benjamin L. Byerly, Elmer Lujan, Lav Tandon, Lisa E Townsend, Khal Spencer, Floyd E. Stanley, Mike Schappert
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 310:623-632
In this study, a certified plutonium metal reference material (CRM 126) with a known production history is examined using analytical methods that are commonly employed in nuclear forensics for provenancing and attribution. The measured plutonium isot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ddf8356dc9640df4b857df3fd030536d
https://doi.org/10.1007/s10967-016-4919-x
https://doi.org/10.1007/s10967-016-4919-x
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 307:2459-2463
Twenty-one high purity germanium (HPGe) background spectra were collected over 2 years at Los Alamos National Laboratory. A quality assurance methodology was developed to monitor spectral background levels from thermal and fast neutron flux levels an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::76f8e7425d8c51517353d65f3a4f133b
https://doi.org/10.1007/s10967-015-4467-9
https://doi.org/10.1007/s10967-015-4467-9
Autor:
Gerard Jungman, Jamie L. Doyle, Benjamin L. Byerly, Lav Tandon, Donivan R. Porterfield, Anna Hayes, Angela C. Olson, P. Jaffke, Steven C. Myers
Publikováno v:
Physical Review Applied. 8
We test common fluence diagnostics in the regime of very low burnup natural uranium reactor samples. The fluence diagnostics considered are the uranium isotopics ratios $^{235}$U/$^{238}$U and $^{236}$U/$^{235}$U, for which we find simple analytic fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::97ff742b7ba2df1bf16b13be39361d79
https://doi.org/10.1103/physrevapplied.8.044025
https://doi.org/10.1103/physrevapplied.8.044025
Autor:
Kevin John Kuhn, Galey Jean Bland, James Brent Fulwyler, Katherine Garduno, Russell C. Keller, Dylan James Klundt, Elmer J. W Lujan, Zoe Francoise Elise Mark, Kattathu Joseph Mathew, Laura Claire Ortega, Chelsea Faith Ottenfeld, Donivan R. Porterfield, Michael Sean Rearick, Jung Ho Rim, Ann Rene Schake, Michael Francis Schappert, Floyd E. Stanley, Mariam R. Thomas, Ernest Miller II Wylie, Ning Xu, Lav Tandon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a35867d59df99491b393131aa05554b
https://doi.org/10.2172/1392818
https://doi.org/10.2172/1392818
This report discusses uncertainty metrics pertaining to the FRAM (Fixed Energy, Response Function Analysis with Multiple Efficiencies) model with respect to several actinide nuclei, especially 241Am.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6594d28bb7c012200eb5dd8623ae876c
https://doi.org/10.2172/1321661
https://doi.org/10.2172/1321661
Autor:
Mariam R. Thomas, Steven C. Myers, Khalil J. Spencer, Patrick T. Martinez, Donivan R. Porterfield, Lav Tandon
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 296:429-434
Nineteen groups of Marple series cascade impact filters were used to collect aerosol particles associated with various operations in plutonium glove boxes. The cascade impactor separated particles based upon size, while the total mass of plutonium de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8786ad92d440149cc7b907323b615833
https://doi.org/10.1007/s10967-012-2150-y
https://doi.org/10.1007/s10967-012-2150-y