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

被引：26

作者：

Abe, K. ^{[1
,5
]}

Hiraide, K. ^{[1
,5
]}

Ichimura, K. ^{[1
,5
]}

Kishimoto, Y. ^{[1
,5
]}

Kobayashi, K. ^{[1
,5
]}

Kobayashi, M. ^{[1
]}

Moriyama, S. ^{[1
,5
]}

Nakahata, M. ^{[1
,5
]}

Norita, T. ^{[1
]}

Ogawa, H. ^{[1
,5
]}

Sato, K. ^{[1
]}

Sekiya, H. ^{[1
,5
]}

Takachio, O. ^{[1
]}

Takeda, A. ^{[1
,5
]}

Tasaka, S. ^{[1
]}

Yamashita, M. ^{[1
,5
]}

Yang, B. S. ^{[1
,5
]}

Kim, N. Y. ^{[2
]}

Kim, Y. D. ^{[2
]}

Itow, Y. ^{[3
,6
]}

Kanzawa, K. ^{[3
]}

Kegasa, R. ^{[3
]}

Masuda, K. ^{[3
]}

Takiya, H. ^{[3
]}

Fushimi, K. ^{[4
,12
]}

Kanzaki, G. ^{[4
]}

Martens, K. ^{[5
]}

Suzuki, Y. ^{[5
]}

Xu, B. D. ^{[5
]}

Fujita, R. ^{[7
]}

Hosokawa, K. ^{[7
,13
]}

Miuchi, K. ^{[7
]}

Oka, N. ^{[7
]}

Takeuchi, Y. ^{[5
,7
]}

Kim, Y. H. ^{[2
,8
]}

Lee, K. B. ^{[8
]}

Lee, M. K. ^{[8
]}

Fukuda, Y. ^{[9
]}

Miyasaka, M. ^{[10
]}

Nishijima, K. ^{[10
]}

Nakamura, S. ^{[11
]}

机构：

[1] Univ Tokyo, Kamioka Observ, Inst Cosm Ray Res, Gifu 5061205, Japan

[2] Inst for Basic Sci Korea, Ctr Underground Phys, 70 Yuseong Daero 1689 Gil, Daejeon 305811, South Korea

[3] Nagoya Univ, Inst Space Earth Environm Res, Nagoya, Aichi 4648601, Japan

[4] Univ Tokushima, Inst Socioarts & Sci, 1-1 Minamijosanjimacho, Tokushima, Tokushima 7708502, Japan

[5] Univ Tokyo, Kavli Inst Phys & Math Universe WPI, Kashiwa, Chiba 2778582, Japan

[6] Nagoya Univ, Kobayashi Maskawa Inst Origin Particles & Univers, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648602, Japan

[7] Kobe Univ, Dept Phys, Kobe, Hyogo 6578501, Japan

[8] Korea Res Inst Stand & Sci, Daejeon 305340, South Korea

[9] Miyagi Univ Educ, Dept Phys, Sendai, Miyagi 9800845, Japan

[10] Tokai Univ, Dept Phys, Hiratsuka, Kanagawa 2591292, Japan

[11] Yokohama Natl Univ, Fac Engn, Dept Phys, Yokohama, Kanagawa 2408501, Japan

[12] Tokushima Univ, Dept Phys, 2-1 Minami Josanjimacho, Tokushima, Tokushima 7708506, Japan

[13] Tohoku Univ, Res Ctr Neutrino Sci, Sendai, Miyagi 9808578, Japan

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2018年 / 884卷

关键词：

Pb-210; Po-210; Copper; Radio purity; Alpha spectroscopy;

D O I：

10.1016/j.nima.2017.12.015

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We established a method to assay Pb-210 and Po-210 contaminations in the bulk of copper samples using a low-background alpha particle counter. The achieved sensitivity for the Pb-210 and Po-210 contaminations reaches a few mBq/kg. Due to this high sensitivity, the Pb-210 and Po-210 contaminations in oxygen free copper bulk were identified and measured for the first time. The Pb-210 contaminations of our oxygen free copper samples were 17-40 mBq/kg. Based on our investigation of copper samples in each production step, the Pb-210 in oxygen free copper was understood to be a small residual of an electrolysis process. This method to measure bulk contaminations of Pb-210 and Po-210 could be applied to other materials. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：157 / 161

页数：5

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