Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Elmer Lujan"'
Autor:
Lisa E Townsend, Khalil J. Spencer, Amy M. Gaffney, Lisa Michelle Colletti, Debbie A. Bostick, Richard M. Essex, John D. Partridge, Joe M. Giaquinto, Alice K. Slemmons, Ross W. Williams, John Rolinson, Benjamin D. Roach, Elmer Lujan, Lav Tandon, Kerri C. Treinen, Kyle M. Samperton, Cole R. Hexel, Casey C. Finstad, Diana L. Decker, Christopher G. Worley, Floyd E. Stanley, Ning Xu
Publikováno v:
Radiochimica Acta. 110:9-22
Two plutonium oxides were prepared as unique reference materials for measurement of actinide elements present as trace constituents. Each reference material unit is approximately 200 mg of PuO2 powder in a quartz glass bottle. Characterized attribute
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b396f21a62065e1a53001aba100d97a5
https://doi.org/10.1515/ract-2021-1095
https://doi.org/10.1515/ract-2021-1095
Autor:
K. J. Mathew, Katherine Garduno, Lisa Michelle Colletti, Ernest M. Wylie, Elmer Lujan, Laurie F. Walker
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 318:227-233
The modified New Brunswick Laboratory (NBL) Davies and Gray titrimetry method uses potassium dichromate standard 136-f from the National Institute of Standards and Technology for calibration. However, the presence of chromium in the resulting waste s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69d93cf12ac95a378fcf615b4a5cdcb9
https://doi.org/10.1007/s10967-018-6129-1
https://doi.org/10.1007/s10967-018-6129-1
Autor:
Sean D. Reilly, A.B. Schroeder, Katherine Garduno, Lisa Michelle Colletti, Elmer Lujan, Iain May, J. Rowley, R. Copping, A. Mechler-Hickson, A.K. Mauser, D. Rios
Publikováno v:
Talanta. 175:390-405
Through assay analysis into an excess of 1M H2SO4 at fixed temperature a technique has been developed for uranium concentration analysis by visible absorption spectroscopy over an assay concentration range of 1.8-13.4mgU/g. Once implemented for a par
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d6e9db4319969398fe4b5ed1dfefebb
https://doi.org/10.1016/j.talanta.2017.07.051
https://doi.org/10.1016/j.talanta.2017.07.051
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
Autor:
Laurie F. Walker, Ning Xu, Katherine Garduno, Fiona Taylor, D. Gallimore, Pam Thompson, Elmer Lujan, Lav Tandon
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 307:1203-1213
An analytical chemistry method has been developed that removes the plutonium (Pu) matrix from the dissolved Pu metal or oxide solution prior to the determination of trace impurities that are present in the metal or oxide. In this study, a Pu oxalate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67413addfeb347c89ae4134e600ca41d
https://doi.org/10.1007/s10967-015-4218-y
https://doi.org/10.1007/s10967-015-4218-y
Autor:
Ning Xu, Dennis Patrick Montoya, D. Gallimore, Kevin J. Kuhn, Elmer Lujan, Lav Tandon, Katherine Garduno, Alexander Martinez, Michael Francis Schappert
Publikováno v:
Applied Radiation and Isotopes. 95:85-89
Five sealed plutonium-beryllium (PuBe) neutron sources from various manufacturers were disassembled. Destructive chemical analyses for recovered PuBe materials were conducted for disposition purposes. A dissolution method for PuBe alloys was develope
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::10ce044a235872db1ef3ecbf0143d982
https://doi.org/10.1016/j.apradiso.2014.10.013
https://doi.org/10.1016/j.apradiso.2014.10.013