Identification of 210Pb and 210Po in the bulk of copper samples with a low-background alpha particle counter

Kazuyoshi Kobayashi

doi:10.1063/1.5018989

Identification of ²¹⁰Pb and ²¹⁰Po in the bulk of copper samples with a low-background alpha particle counter

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We established a method to assay ²¹⁰Pb and ²¹⁰Po contaminations in the bulk of copper samples using a low-background alpha particle counter. The achieved sensitivity for the ²¹⁰Pb and ²¹⁰Po contaminations reaches a few mBq/kg. Due to this high sensitivity, the ²¹⁰Pb and ²¹⁰Po contaminations in oxygen free copper bulk were identified and measured for the first time. The ²¹⁰Pb contaminations of our oxygen free copper samples were 17-40 mBq/kg. Based on our investigation of copper samples in each production step, the ²¹⁰Pb in oxygen free copper was understood to be a small residual of an electrolysis process. This method to measure bulk contaminations of ²¹⁰Pb and ²¹⁰Po could be applied to other materials.

Original language	English
Title of host publication	Low Radioactivity Techniques 2017, LRT 2017
Subtitle of host publication	Proceedings of the 6th International Workshop on Low Radioactivity Techniques
Editors	Douglas S. Leonard
Publisher	American Institute of Physics Inc.
ISBN (Electronic)	9780735416130
DOIs	https://doi.org/10.1063/1.5018989
Publication status	Published - 2018 Jan 3
Externally published	Yes
Event	6th International Workshop on Low Radioactivity Techniques, LRT 2017 - Seoul, Korea, Republic of Duration: 2017 May 23 → 2017 May 27

Publication series

Name	AIP Conference Proceedings
Volume	1921
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	6th International Workshop on Low Radioactivity Techniques, LRT 2017
Country/Territory	Korea, Republic of
City	Seoul
Period	17/5/23 → 17/5/27

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1063/1.5018989

Cite this

Kobayashi, K. (2018). Identification of ²¹⁰Pb and ²¹⁰Po in the bulk of copper samples with a low-background alpha particle counter. In D. S. Leonard (Ed.), Low Radioactivity Techniques 2017, LRT 2017: Proceedings of the 6th International Workshop on Low Radioactivity Techniques [030002] (AIP Conference Proceedings; Vol. 1921). American Institute of Physics Inc.. https://doi.org/10.1063/1.5018989

Identification of ²¹⁰Pb and ²¹⁰Po in the bulk of copper samples with a low-background alpha particle counter. / Kobayashi, Kazuyoshi.
Low Radioactivity Techniques 2017, LRT 2017: Proceedings of the 6th International Workshop on Low Radioactivity Techniques. ed. / Douglas S. Leonard. American Institute of Physics Inc., 2018. 030002 (AIP Conference Proceedings; Vol. 1921).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Kobayashi, K 2018, Identification of ²¹⁰Pb and ²¹⁰Po in the bulk of copper samples with a low-background alpha particle counter. in DS Leonard (ed.), Low Radioactivity Techniques 2017, LRT 2017: Proceedings of the 6th International Workshop on Low Radioactivity Techniques., 030002, AIP Conference Proceedings, vol. 1921, American Institute of Physics Inc., 6th International Workshop on Low Radioactivity Techniques, LRT 2017, Seoul, Korea, Republic of, 17/5/23. https://doi.org/10.1063/1.5018989

Kobayashi K. Identification of ²¹⁰Pb and ²¹⁰Po in the bulk of copper samples with a low-background alpha particle counter. In Leonard DS, editor, Low Radioactivity Techniques 2017, LRT 2017: Proceedings of the 6th International Workshop on Low Radioactivity Techniques. American Institute of Physics Inc. 2018. 030002. (AIP Conference Proceedings). doi: 10.1063/1.5018989

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title = "Identification of 210Pb and 210Po in the bulk of copper samples with a low-background alpha particle counter",

abstract = "We established a method to assay 210Pb and 210Po contaminations in the bulk of copper samples using a low-background alpha particle counter. The achieved sensitivity for the 210Pb and 210Po contaminations reaches a few mBq/kg. Due to this high sensitivity, the 210Pb and 210Po contaminations in oxygen free copper bulk were identified and measured for the first time. The 210Pb contaminations of our oxygen free copper samples were 17-40 mBq/kg. Based on our investigation of copper samples in each production step, the 210Pb in oxygen free copper was understood to be a small residual of an electrolysis process. This method to measure bulk contaminations of 210Pb and 210Po could be applied to other materials.",

author = "Kazuyoshi Kobayashi",

note = "Funding Information: We gratefully acknowledge the cooperation of Mitsubishi Materials Corporation. They kindly provide us the copper samples in each copper production process, that helps the understanding of the origin of 210Pb in OFC. We also gratefully acknowledge the cooperation of Kamioka Mining and Smelting Company. This work was supported by the Japanese Ministry of Education, Culture, Sports, Science and Technology, Grant-in-Aid for Scientific Research, ICRR Joint-Usage, JSPS KAKENHI Grant Number, 26104004. Publisher Copyright: {\textcopyright} 2018 Author(s).; 6th International Workshop on Low Radioactivity Techniques, LRT 2017 ; Conference date: 23-05-2017 Through 27-05-2017",

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N2 - We established a method to assay 210Pb and 210Po contaminations in the bulk of copper samples using a low-background alpha particle counter. The achieved sensitivity for the 210Pb and 210Po contaminations reaches a few mBq/kg. Due to this high sensitivity, the 210Pb and 210Po contaminations in oxygen free copper bulk were identified and measured for the first time. The 210Pb contaminations of our oxygen free copper samples were 17-40 mBq/kg. Based on our investigation of copper samples in each production step, the 210Pb in oxygen free copper was understood to be a small residual of an electrolysis process. This method to measure bulk contaminations of 210Pb and 210Po could be applied to other materials.

AB - We established a method to assay 210Pb and 210Po contaminations in the bulk of copper samples using a low-background alpha particle counter. The achieved sensitivity for the 210Pb and 210Po contaminations reaches a few mBq/kg. Due to this high sensitivity, the 210Pb and 210Po contaminations in oxygen free copper bulk were identified and measured for the first time. The 210Pb contaminations of our oxygen free copper samples were 17-40 mBq/kg. Based on our investigation of copper samples in each production step, the 210Pb in oxygen free copper was understood to be a small residual of an electrolysis process. This method to measure bulk contaminations of 210Pb and 210Po could be applied to other materials.

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