Improved method for measuring low-concentration radium and its application to the Super-Kamiokande Gadolinium project

• Ito, S.

• Ichimura, K.

• Takaku, Y.

• Abe, K.

• Harada, M.

• Ikeda, M.

• Ito, H.

• Kishimoto, Y.

• Nakajima, Y.

• Okada, T.

• Sekiya, H.

抄録

Chemical extraction using a molecular recognition resin named "Empore Radium Rad Disk" was developed to improve sensitivity for the low concentration of radium (Ra). Compared with the previous method, the extraction process speed was improved by a factor of three and the recovery rate for Ra-226 was also improved from 81 +/- 4% to > 99.9%. The sensitivity on the 10(-1) mBq level was achieved using a high-purity germanium detector. This improved method was applied to determine Ra-226 in Gd-2(SO4)(3)center dot 8H(2)O which will be used in the Super-Kamiokande Gadolinium project. The improvement and measurement results are reported in this paper.

収録刊行物

• Progress of Theoretical and Experimental Physics

  Progress of Theoretical and Experimental Physics 2020 (9), 093H02-, 2020-09-20

  Oxford University Press

キーワード

• General Physics and Astronomy

詳細情報

• CRID: 1050287628878673152
• NII論文ID: 120006951262
• ISSN: 20503911
• DOI: 10.1093/ptep/ptaa105
• Web Site: https://ousar.lib.okayama-u.ac.jp/61253
• Web Site: http://academic.oup.com/ptep/article-pdf/2020/9/093H02/33774486/ptaa105.pdf
• 本文言語コード: en
• 資料種別: journal article
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