Development of the measurement of radium using a germanium detector with molecular recognition resin

S. Ito; K. Ichimura; Y. Takaku; K. Abe; M. Ikeda; Y. Kishimoto

doi:10.1093/ptep/pty096

Development of the measurement of radium using a germanium detector with molecular recognition resin

S. Ito, K. Ichimura, Y. Takaku, K. Abe, M. Ikeda, Y. Kishimoto

Research output: Contribution to journal › Article › peer-review

Abstract

High-purity germanium (HPGe) detectors are widely used for the measurement of low concentrations of radioactivity. For the Super-Kamiokande Gadolinium project, the concentration of radium in Gd₂(SO₄)₃·8H₂O is determined by using HPGe detectors. The amount of the sample is generally limited by the size of the sample space of an HPGe detector. This leads to limitation of the detector efficiency. A new method of chemical extraction using molecular recognition resin was developed to minimize this problem. Using the developed method, radium could be extracted from Gd₂(SO₄)₃·8H₂O and concentrated to a smaller amount of the resin at a recovery rate of 81%±4%, which was estimated by using barium as a recovery monitor. This made it possible to set the sample closer to an HPGe crystal and reduce the self-screening effect, resulting in increased detection efficiency for an HPGe detector. The method developed is reported in this letter.

Original language	English
Article number	pty096
Journal	Progress of Theoretical and Experimental Physics
Volume	2018
Issue number	9
DOIs	https://doi.org/10.1093/ptep/pty096
Publication status	Published - 2018 Sept 1
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Development of the measurement of radium using a germanium detector with molecular recognition resin",

abstract = "High-purity germanium (HPGe) detectors are widely used for the measurement of low concentrations of radioactivity. For the Super-Kamiokande Gadolinium project, the concentration of radium in Gd2(SO4)3·8H2O is determined by using HPGe detectors. The amount of the sample is generally limited by the size of the sample space of an HPGe detector. This leads to limitation of the detector efficiency. A new method of chemical extraction using molecular recognition resin was developed to minimize this problem. Using the developed method, radium could be extracted from Gd2(SO4)3·8H2O and concentrated to a smaller amount of the resin at a recovery rate of 81%±4%, which was estimated by using barium as a recovery monitor. This made it possible to set the sample closer to an HPGe crystal and reduce the self-screening effect, resulting in increased detection efficiency for an HPGe detector. The method developed is reported in this letter.",

author = "S. Ito and K. Ichimura and Y. Takaku and K. Abe and M. Ikeda and Y. Kishimoto",

note = "Funding Information: This work was supported by the JSPS KAKENHI Grants-in-Aid for Scientific Research on Innovative Areas Nos. 26104004 and 26104006, Grant-in-Aid for Specially Promoted Research No. 26000003, Grant-in-Aid for Young Scientists No. 17K14290, and Grant-in-Aid for JSPS Research Fellow No. 18J00049. We thank the company who provided the Gd2(SO4)3·8H2O sample. Publisher Copyright: {\textcopyright} The Author(s) 2018.",

year = "2018",

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doi = "10.1093/ptep/pty096",

language = "English",

volume = "2018",

journal = "Progress of Theoretical and Experimental Physics",

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AU - Ito, S.

AU - Ichimura, K.

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AU - Abe, K.

AU - Ikeda, M.

AU - Kishimoto, Y.

N1 - Funding Information: This work was supported by the JSPS KAKENHI Grants-in-Aid for Scientific Research on Innovative Areas Nos. 26104004 and 26104006, Grant-in-Aid for Specially Promoted Research No. 26000003, Grant-in-Aid for Young Scientists No. 17K14290, and Grant-in-Aid for JSPS Research Fellow No. 18J00049. We thank the company who provided the Gd2(SO4)3·8H2O sample. Publisher Copyright: © The Author(s) 2018.

PY - 2018/9/1

Y1 - 2018/9/1

N2 - High-purity germanium (HPGe) detectors are widely used for the measurement of low concentrations of radioactivity. For the Super-Kamiokande Gadolinium project, the concentration of radium in Gd2(SO4)3·8H2O is determined by using HPGe detectors. The amount of the sample is generally limited by the size of the sample space of an HPGe detector. This leads to limitation of the detector efficiency. A new method of chemical extraction using molecular recognition resin was developed to minimize this problem. Using the developed method, radium could be extracted from Gd2(SO4)3·8H2O and concentrated to a smaller amount of the resin at a recovery rate of 81%±4%, which was estimated by using barium as a recovery monitor. This made it possible to set the sample closer to an HPGe crystal and reduce the self-screening effect, resulting in increased detection efficiency for an HPGe detector. The method developed is reported in this letter.

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Development of the measurement of radium using a germanium detector with molecular recognition resin

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