加速器質量分析法によるストロンチウム90の迅速かつ高感度な検出手法の開発

笹 公和; 細谷 青児; 本多 真紀; 高橋 努; 佐藤 志彦; 落合 悠太; 高野 健太; 末木 啓介

doi:10.14862/geochemproc.65.0_229

Abstracts of Annual Meeting of the Geochemical Society of Japan

DOI https://doi.org/10.14862/geochemproc.65.0_229

Conference information

Host: Abstracts of Annual Meeting of the Geochemical Society of Japan

Development of the Fast and Ultrasensitive Determination Method for Strontium-90 by Accelerator Mass Spectrometry

*Kimikazu Sasa, Seiji Hosoya, Maki Honda, Tsutomu Takahashi, Yukihiko Satou, Yuta Ochiai, Kenta Takano, Keisuke Sueki

Author information

Keywords: Strontium-90, Accelerator Mass Spectrometry, 6 MV tandem accelerator, Anthropocene, Anthropogenic radionuclide

CONFERENCE PROCEEDINGS FREE ACCESS

Pages 229-

Details

Abstract

⁹⁰Sr is an important radioactive nuclide for environmental impact assessment on atomic accidents or nuclear bomb tests. However, it is difficult to measure ⁹⁰Sr rapidly by the usual method. ⁹⁰Sr-AMS has been developed with the 6 MV tandem accelerator mass spectrometry system at the University of Tsukuba. SrF₃^- could be extracted about 400 nA from SrF₂ samples mixed with PbF₂. ⁹⁰Sr⁸⁺ with an energy of 51.8 MeV was detected by the gas ionization detector. The detection limit of ⁹⁰Sr isotopic ratio was achieved about 6 × 10^-13 (~3 mBq) by AMS.

Corresponding author

Register with J-STAGE for free!