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

S. Ito; K. Ichimura; Y. Takaku; K. Abe; M. Harada; M. Ikeda; H. Ito; Y. Kishimoto; Y. Nakajima; T. Okada; H. Sekiya

doi:10.1093/ptep/ptaa105

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

S. Ito, K. Ichimura, Y. Takaku, K. Abe, M. Harada, M. Ikeda, H. Ito, Y. Kishimoto, Y. Nakajima, T. Okada, H. Sekiya

Research Center for Neutrino Science (RCNS)

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2 Citations (Scopus)

Abstract

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 226Ra 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 226Ra in Gd2(SO4)3 8H2Owhich will be used in the Super-Kamiokande Gadolinium project. The improvement and measurement results are reported in this paper.

Original language	English
Article number	093H02
Journal	Progress of Theoretical and Experimental Physics
Volume	2020
Issue number	9
DOIs	https://doi.org/10.1093/ptep/ptaa105
Publication status	Published - 2020 Sept 1

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abstract = "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 226Ra 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 226Ra in Gd2(SO4)3 8H2Owhich will be used in the Super-Kamiokande Gadolinium project. The improvement and measurement results are reported in this paper.",

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T1 - Improved method for measuring low-concentration radium and its application to the Super-Kamiokande Gadolinium project

AU - Ito, S.

AU - Ichimura, K.

AU - Takaku, Y.

AU - Abe, K.

AU - Harada, M.

AU - Ikeda, M.

AU - Ito, H.

AU - Kishimoto, Y.

AU - Nakajima, Y.

AU - Okada, T.

AU - Sekiya, H.

PY - 2020/9/1

Y1 - 2020/9/1

N2 - 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 226Ra 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 226Ra in Gd2(SO4)3 8H2Owhich will be used in the Super-Kamiokande Gadolinium project. The improvement and measurement results are reported in this paper.

AB - 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 226Ra 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 226Ra in Gd2(SO4)3 8H2Owhich will be used in the Super-Kamiokande Gadolinium project. The improvement and measurement results are reported in this paper.

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

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