☆ 4.5 Article Proceedings Paper

Further development of accelerator mass spectrometry for the measurement of Sr-90 at Lawrence Livermore National Laboratory

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY (2009)

期刊

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY

卷 282, 期 3, 页码 821-824

出版社

SPRINGER

DOI: 10.1007/s10967-009-0327-9

关键词

Sr-90; AMS; Gas ionization detector; Silicon nitride windows

类别

Chemistry, Analytical Chemistry, Inorganic & Nuclear Nuclear Science & Technology

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摘要

Based on the encouraging results of our initial efforts to develop a Sr-90 accelerator mass spectrometry capability, we have undertaken efforts to enhance our system. By changing some key operating parameters and constructing an optimized detector we were able to improve the discrimination of Sr-90 from the isobaric interference Zr-90 and reduce our instrumental background by nearly two orders of magnitude. Our current background (4 x 10(6) atoms, 3 mBq) is comparable to that achievable by decay counting, but is still a factor of ten higher than what is theoretically predicted based on the efficiency of our system. Therefore, future plans include implementation of a time-of-flight system to improve the rejection of Zr-90.

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