| アイテムタイプ |
文献 / Documents(1) |
| 公開日 |
2022-04-15 |
| アクセス権 |
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アクセス権 |
open access |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 出版社版DOI |
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関連識別子 |
https://doi.org/10.1093/ptep/ptab020 |
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関連名称 |
10.1093/ptep/ptab020 |
| 出版タイプ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| タイトル |
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タイトル |
Development of highly radiopure NaI(Tl) scintillator for PICOLON dark matter search project |
| 著者 |
伏見, 賢一
カネミツ
ヒラタ
Chernyak, D.
硲, 隆太
イケダ
イマガワ
イシウラ
イトウ
キシモト
Kozlov, A.
タケモト
ヤスダ
江尻, 宏泰
ハタ
イイダ
イノウエ
コガ
ナカムラ
折戸, 玲子
シマ
ウメハラ
ヨシダ
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| 抄録 |
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内容記述 |
Highly radiopure NaI(Tl) was developed to search for particle candidates of dark matter. Optimized methods were combined to reduce various radioactive impurities. 40K was effectively reduced by the recrystallization method. The progenies of the decay chains of uranium and thorium were reduced by appropriate resins. The concentration of natural potassium in NaI(Tl) crystal was reduced to 20 ppb. Concentrations of alpha-ray emitters were successfully reduced by appropriate resin selection. The present concentrations of the thorium series and 226Ra were 1.2±1.4μBq/kg and 13±4μBq/kg, respectively. No significant excess in the concentration of 210Pb was obtained, and the upper limit was 5.7 μBq/kg at 90% CL. The achieved level of radiopurity of NaI(Tl) crystals makes the construction of a dark matter detector possible. |
| 書誌情報 |
en : Progress of Theoretical and Experimental Physics
巻 2021,
号 4,
p. 043F01,
発行日 2021-02-16
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| 収録物ID |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
20503911 |
| 出版者 |
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出版者 |
The Physical Society of Japan |
| 出版者 |
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出版者 |
Oxford University Press |
| 権利情報 |
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権利情報 |
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
| EID |
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識別子 |
376620 |
| 言語 |
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言語 |
eng |
ptep_2021_4_043F01.pdf (632 KB)
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