Preparation of 241Am/243Am gravimetric mixtures and development of Am isotopic and assay measurement techniques using thermal ionization mass spectrometry

Mathew, Kattathu Joseph; Ottenfeld, Chelsea Faith; Keller, Russell C.; Kuhn, Kevin John; Fulwyler, James Brent

doi:10.1016/j.ijms.2020.116430

Preparation of²⁴¹Am/²⁴³Am gravimetric mixtures and development of Am isotopic and assay measurement techniques using thermal ionization mass spectrometry

Journal Article · Thu Sep 10 00:00:00 EDT 2020 · International Journal of Mass Spectrometry

DOI:https://doi.org/10.1016/j.ijms.2020.116430· OSTI ID:1660598

Mathew, Kattathu Joseph ^[1]; Ottenfeld, Chelsea Faith ^[1]; Keller, Russell C. ^[1]; Kuhn, Kevin John ^[1]; Fulwyler, James Brent ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Three gravimetric mixtures with ²⁴¹Am/²⁴³Am isotope ratios at nominally 1:1, 20:1, and 200:1 were prepared for calibration of the thermal ionization mass spectrometer instruments used for americium isotopic and assay measurements by isotope dilution mass spectrometry. The total evaporation analytical technique was developed for high-accuracy and precision measurements of Am isotopic ratios. The technique was also applied to Am assay measurements using isotope dilution mass spectrometry. The Am isotope ratio and assay measurement techniques were utilized to characterize batches of americium oxide separated from plutonium materials in storage at Los Alamos National Laboratory in support of commercial use of ²⁴¹AmO₂.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 1660598

Report Number(s):: LA-UR--20-23098

Journal Information:: International Journal of Mass Spectrometry, Journal Name: International Journal of Mass Spectrometry Vol. 458; ISSN 1387-3806

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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