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

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Title
Identification of 210Pb and 210Po in the bulk of copper samples with a low-background alpha particle counter
Author(s)
Abe K.; Hiraide K.; Ichimura K.; Kishimoto Y.; Kobayashi K.; Kobayashi M.; Moriyama S.; Nakahata M.; Norita T.; Ogawa H.; Sato K.; Sekiya H.; Takachio O.; Takeda A.; Tasaka S.; Yamashita M.; Yang B.S.; Nam Young Kim; Yeongduk Kim; Itow Y.; Kanzawa K.; Kegasa R.; Masuda K.; Takiya H.; Fushimi K.; Kanzaki G.; Martens K.; Suzuki Y.; Xu B.D.; Fujita R.; Hosokawa K.; Miuchi K.; Oka N.; Takeuchi Y.; Yong Hamb Kim; Lee K.B.; Lee M.K.; Fukuda Y.; Miyasaka M.; Nishijima K.; Nakamura S.
Publication Date
2018-03
Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, v.884, no., pp.157 - 161
Publisher
ELSEVIER SCIENCE BV
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. © 2017 Elsevier B.V
URI
https://pr.ibs.re.kr/handle/8788114/4620
ISSN
0168-9002
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > Journal Papers (저널논문)
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