CANDLES-III detector: Low-background spectrometer for studying neutrino-less double <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si369.svg" display="inline" id="d1e2533"><mml:mi>β</mml:mi></mml:math> decay of 48Ca
The CANDLES-III detector was installed at the Kamioka Observatory in Japan to investigate the double β decay of 48 Ca. This system combines an undoped calcium fluoride scintillator with a long attenuation length (larger than 100 cm), and a two-phase liquid scintillator, thereby serving as a larger-mass detector of 305 kg (contains 350 g of 48 Ca) while maintaining a high energy resolution ( σ = 2 . 6 % at Q -value of 48 Ca double beta decay). Low-background conditions are achieved in the energy region of interest by improving the light yield and collection efficiency of the detector system, allowing to access a high energy resolution, as well as by installing passive and active radiation shielding, and using pulse-shape analysis. This paper describes the details of the detector including its site and data acquisition system and presents its performance characterization.
Authors
- Y. Takemoto
- M. Tsuzuki
- K. Yasuda
- Y. Takihira
- N. Yotsunaga
- S. Umehara (ORCID: https://orcid.org/0000-0003-2176-079X)
- K. Tetsuno
- K. Morishita
- K. Mizukoshi (ORCID: https://orcid.org/0000-0002-3723-7250)
- S. Yoshida (ORCID: https://orcid.org/0000-0003-2480-5105)
- R. Hazama
- Kyoko Suzuki (ORCID: https://orcid.org/0000-0002-8380-1561)
- Takuya Uehara (ORCID: https://orcid.org/0000-0002-3584-3548)
- T. Iida (ORCID: https://orcid.org/0000-0002-4052-5392)
- Izumi Ogawa (ORCID: https://orcid.org/0000-0003-3047-0567)
- T. Batpurev
- Y. Tamagawa (ORCID: https://orcid.org/0000-0003-0095-7366)
- M. Nomachi
- Anawat Rittirong
- K. Akutagawa
- X. Li
- K. Ichimura
- B. T. Khai (ORCID: https://orcid.org/0000-0003-2959-3906)
- N. Takahashi
- K. Nakajima
- K. Fushimi
- N. Nakatani
- M. Tozawa
- Ken Matsuoka (ORCID: https://orcid.org/0000-0001-7229-7294)
- S. Ajimura (ORCID: https://orcid.org/0000-0003-0998-0933)
- M. Yoshizawa
- H. Kakubata
- Akihiko Masuda (ORCID: https://orcid.org/0000-0003-0572-0341)
- T. Kishimoto
- Toshihiro Ohata
- K. Kanagawa
- M. Saka
- S. Katagiri
- T. Maeda
- V. T. T. Trang (ORCID: https://orcid.org/0000-0002-1957-9222)
- F. Doukaku
Institutions
- University of Fukui (JP)
- Fukui University of Technology (JP)
- Osaka Sangyo University (JP)
- University of Tsukuba (JP)
- Tokushima College of Technology (JP)
- Tokushima University (JP)
- The University of Osaka (JP)
Publication Details
- Journal
- Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment
- Published
- 2024-10-20
- DOI
- https://doi.org/10.1016/j.nima.2024.169982
- Primary Topic
- Neutrino Physics Research
- Type
- article
- Field-Weighted Citation Impact
- 0.00