Evaluating uranium radiochronometry by single-collector mass spectrometry for nuclear forensics: a multi-instrument investigation |
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Authors: | Treinen Kerri C. Samperton Kyle M. Lindvall Rachel E. Wimpenny Josh B. Gaffney Amy M. Bavio Marta Baransky Eva J. Williams Ross W. |
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Affiliation: | 1.Nuclear and Chemical Sciences Division, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA, 94550, USA ;2.National Atomic Energy Commission, Av. Gral. Paz 1499, Partido Gral., B1650KNA, San Martín, Bs. As. Province, Argentina ; |
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Abstract: | Radiochronometric data, a key signature in evaluating the provenance and process history of nuclear material out of regulatory control, are conventionally acquired via multi-collector mass spectrometry. Here we explore the potential of age-dating by single-collector mass spectrometry. To evaluate model age accuracy/precision across different instrument designs, we performed 230Th–234U and 231Pa–235U radiochronometry of CRM 125-A using two single-collector and one multi-collector plasma source mass spectrometers. Single-collector instruments produce accurate model ages for this uranium standard and thus hold promise for nuclear forensics radiochronometry. Increased acquisition of age information via multiple instrument designs will bolster the global response to nuclear interdictions. |
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