NDLI: An alternative method for chronometric determinations involving curium

Content Provider	Royal Society of Chemistry (RSC)
Author	Clark, S. B. Cadieux, J. R. Kurosaki, H.
Copyright Year	2014
Abstract	A method for quantifying ratios of isotopes of plutonium (Pu), americium (Am), and curium (Cm) using inductively coupled plasma mass spectrometry (ICP-MS) is described that does not require radiochemical separations or a chemical yield monitor. This approach provides more rapid analysis, which is important for chronometric applications related to nuclear forensics analysis. To demonstrate its utility, we used it to quantify the ingrowth 240Pu (t1/2 = 6563 years) from 244Cm (t1/2 = 18.10 years) in a solution of unknown “age” (e.g. time since last separation). Results are compared to similar samples for which the time since separation was known. In addition, alpha spectrometry was used to validate the ICP-MS measurements. In this case, 238Pu and 241Am were used as chemical yield monitors for 240Pu and 244Cm, respectively. The relative standard deviation for the isotope ratio method using ICP-MS was slightly greater than the traditional radiometric approach, but sufficient for this application. Measured activity ratios of 240Pu and 244Cm provided an age for the unknown sample that linked it to research activities involving the production of curium isotopes for thermoelectric heat sources during the late 1970's.
Starting Page	2419
Ending Page	2423
Page Count	5
File Format	HTM / HTML PDF
ISSN	02679477
Volume Number	29
Issue Number	12
Journal	Journal of Analytical Atomic Spectrometry
DOI	10.1039/c4ja00256c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Plutonium Americium Curium Inductively coupled plasma mass spectrometry Yield (chemistry) Plutonium-240 E.G. Time Plutonium-238 Coefficient of variation Isotope Radiometric dating Thermoelectric effect
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Analytical Chemistry

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