학술논문
Development of a low-background HPGe detector at Kamioka Observatory
Document Type
Working Paper
Author
Source
Progress of Theoretical and Experimental Physics, Volume 2023, Issue 12, December 2023, 123H01
Subject
Language
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.