Improved method for measuring low-concentration radium and its application to the Super-Kamiokande Gadolinium project-Reference-Cited by-同舟云学术

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

Published:2020-09-01 Issue:9 Volume:2020 Page:
ISSN:2050-3911
Container-title:Progress of Theoretical and Experimental Physics
language:en
Short-container-title:

Author:

Ito S¹,Ichimura K²³,Takaku Y⁴,Abe K²³,Harada M¹,Ikeda M²³,Ito H²,Kishimoto Y²³,Nakajima Y²³,Okada T²,Sekiya H²³

Affiliation:

1. Okayama University, Faculty of Science, Okayama 700-8530, Japan

2. Kamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu 506-1205, Japan

3. Kavli Institute for the Physics and Mathematics of the Universe (WPI), the University of Tokyo, Kashiwa, Chiba, 277-8582, Japan

4. Institute for Environmental Sciences, Department of Radioecology, Aomori, 039-3212, Japan

Abstract

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 $^{226}$Ra was also improved from $81\pm4\%$ 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 $^{226}$Ra in Gd$_2$(SO$_4$)$_3{\cdot}$8H$_2$O which will be used in the Super-Kamiokande Gadolinium project. The improvement and measurement results are reported in this paper.

Publisher

Oxford University Press (OUP)

Subject

General Physics and Astronomy

Link

http://academic.oup.com/ptep/article-pdf/2020/9/093H02/33774486/ptaa105.pdf

Reference24 articles.

1. Determination of226Ra and228Ra in mineral and drinking waters using 3M'S EMPORE™ radium RAD disks

2. Simultaneous Determination of 226Ra and 228Ra in Water by Liquid Scintillation Spectrometry

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