期刊
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
卷 430, 期 -, 页码 57-62出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijms.2018.04.004
关键词
Thermal ionization mass spectrometry (TIMS); Porous ion emitter (PIE); Isotopic fractionation; Uranium; Plutonium; Nuclear forensics
资金
- U.S. Department of Homeland Security [2012-DN-130-NF0001-02]
- U.S. Department of Energy/National Nuclear Security Administration Office of Nonproliferation and Verification Research and Development
- U.S. Department of Energy through the LANL/LDRD Program
Investigations of the isotope fractionation behaviors of plutonium and uranium reference standards were conducted employing platinum and rhenium (Pt/Re) porous ion emitter (PIE) sources, a relatively new thermal ionization mass spectrometry (TIMS) ion source strategy. The suitability of commonly employed, empirically developed mass bias correction laws (i.e., the Linear, Power, and Russell's laws) for correcting such isotope ratio data was also determined. Corrected plutonium isotope ratio data, regardless of mass bias correction strategy, were statistically identical to that of the certificate, however, the process of isotope fractionation behavior of plutonium using the adopted experimental conditions was determined to be best described by the Power law. The fractionation behavior of uranium, using the analytical conditions described herein, is also most suitably modeled using the Power law, though Russell's and the Linear law for mass bias correction rendered results that were identical, within uncertainty, to the certificate value. Published by Elsevier B.V.
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