| Item type |
文献 / Documents(1) |
| 公開日 |
2018-11-12 |
| 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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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1088/1742-6596/718/6/062026 |
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言語 |
ja |
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関連名称 |
10.1088/1742-6596/718/6/062026 |
| 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 |
Status and future prospect of 48Ca double beta decay search in CANDLES |
|
言語 |
en |
| 著者 |
イイダ
ナカジマ
アジムラ
Batpurev, T
Chan, W M
伏見, 賢一
ハザマ
カクバタ
Khai, B T
キシモト
Li, X
マエダ
マスダ
マツオカ
モリシタ
ナカタニ
ノマチ
ノシロ
オガワ
オオハタ
オオスミ
スズキ
タマガワ
テツノ
Trang, V T T
ウエハラ
ウメハラ
ヨシダ
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
The observation of neutrino-less double beta decay (0νββ) would be the most practical way to prove the Majorana nature of the neutrino and lepton number violation. CANDLES studies 48Ca double beta decay using CaF2 scintillator. The main advantage of 48Ca is that it has the highest Q-value (4.27 MeV) among all the isotope candidates for 0νββ.
The CANDLES III detector is currently operating with 300kg CaF2 crystals in the Kamioka underground observatory, Japan. In 2014, a detector cooling system and a magnetic cancellation coil was installed with the aim to increase light emission of CaF2 scintillator and photo-electron collection efficiency of the photo-multipliers. After this upgrade, light yield was increased to 1000 p.e./MeV which is 1.6 times larger than before.
According to data analysis and simulation, main background source in CANDLES is turned out to be high energy external gamma-ray originating neutron capture on the surrounding materials, so called (n,γ). Upgrading the detector by installing neutron and gamma-ray shield can reduce the remaining main backgrounds by two order magnitude. In this report, we discuss the detail of (n,γ) and background reduction by additional shielding. |
|
言語 |
en |
| 書誌情報 |
en : Journal of Physics: Conference Series
巻 718,
p. 062026,
発行日 2016-06-09
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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 |
17426596 |
| 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 |
17426588 |
| 収録物ID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA12839617 |
| 出版者 |
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出版者 |
IOP Publishing |
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言語 |
en |
| 権利情報 |
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|
言語 |
en |
|
権利情報 |
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. |
| EID |
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識別子 |
326432 |
|
識別子タイプ |
URI |
| 言語 |
|
|
言語 |
eng |
jpcs_718_062026.pdf (3.22 MB)
