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ID 116203
Author
Tetsuno, K. Osaka University
Ajimura, S. Osaka University
Akutagawa, K. Osaka University
Batpurev, T. Osaka University
Chan, W. M. Osaka University
Hazama, Ryuta Osaka Sangyo University
Iida, T. University of Tsukuba
Ikeyama, Y. University of Fukui
Khai, B. T. Osaka University
Kishimoto, T. Osaka University
Lee, K. K. Osaka University
Li, X. Osaka University
Matsuoka, K. Osaka University
Matsuoka, K. University of Fukui
Mizukoshi, K. Osaka University
Mori, Y. University of Fukui
Nakajima, K. University of Fukui
Noithong, P. Osaka Sangyo University
Nomachi, M. Osaka University
Ogawa, I. University of Fukui
Ohsumi, H. Saga University
Ozawa, K. University of Fukui
Shimizu, K. University of Fukui
Shokati, M. Osaka University
Soberi, F. Osaka University
Suzuki, K. The Wakasa-wan Energy Research Center
Takemoto, Y. Osaka University
Takihira, Y. Osaka University
Tamagawa, Y. University of Fukui
Tozawa, M. University of Fukui
Trang, V. T. T. Osaka University
Umehara, S. Osaka University
Yamamoto, K. Osaka University
Yoshida, S. Osaka University
Kim, I Institute for Basic Science|Los Alamos National Laboratory
Kwon, D H Institute for Basic Science
Kim, H L Institute for Basic Science
Lee, H J Institute for Basic Science
Lee, M K Korea Research Institute of Standards and Science
Kim, Y H Institute for Basic Science|Korea Research Institute of Standards and Science
Content Type
Journal Article
Description
CANDLES(CAlcium fluoride for the study of Neutrinos and Dark matters by Low Energy Spectrometer) is the experiment to search for the neutrino-less double beta decay(0vββ) of 48Ca with CaF2 scintillator. 48Ca has the highest Qββ-value (4.3 MeV) among all isotope candidates for 0vββ. It enables us to measure signals with very low background condition. After rejection analysis with 131 days × 86 kg data for background events from radioactive contaminations in the CaF2 scintillators, no events are observed in the Qββ-value region. As a result, the 0vββ half-life of 48Ca is greater than 6.2 × 1022 yr (90% confidence level). For further high sensitive measurement of 48Ca 0vββ search, we have been developing the 48Ca enrichment and CaF2 scintillating bolometer techniques. In this paper, the latest result for CANDLES and the status of scintillating bolometer development are described.
Journal Title
Journal of Physics: Conference Series
ISSN
17426596
17426588
NCID
AA12839617
Publisher
IOP Publishing
Volume
1468
Start Page
012132
Published Date
2020-03-20
Rights
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence(https://creativecommons.org/licenses/by/3.0/). Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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DOI (Published Version)
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language
eng
TextVersion
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departments
Science and Technology