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D. Alamelu, P. M. Shah, S. K. Aggarwal

A comparative evaluation of ²³⁸Pu determination in NIST-SRM-947-Pu by alpha spectrometry and thermal ionization mass spectrometry

A comparative evaluation of ²³⁸Pu determination in NIST-SRM-947-Pu isotopic reference material by alpha spectrometry and thermal ionization mass spectrometry (TIMS) is presented. Electrodeposited sources with geometric progression (G.P.) method to account for tail contribution were used in alpha spectrometry. In TIMS, the recently developed approach of using ²³⁵U as a monitor isotope in interfering element correction methodology was employed to account for the isobaric interference of ²³⁸U at ²³⁸Pu. The atom % abundance of ²³⁸Pu determined by both the methods is in good agreement with each other but is higher than that quoted by NIST in the reference material SRM-947-Pu.

Radiochimica Acta, Oldenbourg Wissenschaftsverlag

Print ISSN: 0033-8230
Volume: 93, 05/2005
Pages: 259 - 263

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