Development of a low-background HPGe detector at Kamioka Observatory-Reference-Cited by-同舟云学术

Development of a low-background HPGe detector at Kamioka Observatory

Published:2023-11-08 Issue:12 Volume:2023 Page:
ISSN:2050-3911
Container-title:Progress of Theoretical and Experimental Physics
language:en
Short-container-title:

Author:

Ichimura K¹^ORCID,Ikeda H¹,Kishimoto Y¹²,Kurasawa M¹,Suzuki A A¹,Gando Y¹³,Ikeda M⁴²^ORCID,Hosokawa K⁴^ORCID,Sekiya H⁴²^ORCID,Ito H⁵^ORCID,Minamino A⁶^ORCID,Suzuki S⁶

Affiliation:

1. Research Center for Neutrino Science, Tohoku University , 6-3 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8578 , Japan

2. Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo Institutes for Advanced Study , The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8582 , Japan

3. Department of Human Science, Obihiro University of Agriculture and Veterinary Medicine , Inada-cho Nishi 2-11, Obihiro, Hokkaido 080-8555 , Japan

4. Kamioka Observatory, Institute for Cosmic Ray Research, The University of Tokyo , 456 Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205 , Japan

5. Department of Physics and Astronomy, Faculty of Science and Technology, Tokyo University of Science , 2641 Yamazaki, Noda, Chiba 278-8510 , Japan

6. Department of Physics, Yokohama National University , 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa, 240-8501 , Japan

Abstract

Abstract A new ultra-low background high-purity germanium (HPGe) detector has been installed at the Kamioka underground experimental site. The background count rate in the energy range from 40 keV to 2700 keV is about 25% lower than that of the first HPGe detector installed in 2016, which has the same detector specification and similar shielding geometry. This paper describes the shielding configuration, including the cleaning of the material surface, the comparison of calibration data and simulation, the time variation of the background spectra, the sample measurement procedure, and some results of the radioactivity in the selected samples.

Funder

Japan Society for the Promotion of Science

Publisher

Oxford University Press (OUP)

Subject

General Physics and Astronomy

Link

https://academic.oup.com/ptep/advance-article-pdf/doi/10.1093/ptep/ptad136/53050194/ptad136.pdf

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