Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2017, Vol. 28 ›› Issue (1): 7 doi: 10.1007/s41365-016-0162-y

• NUCLEAR ELECTRONICS AND INSTRUMENTATION • Previous Articles     Next Articles

Characterization of a broad-energy germanium detector for its use in CJPL

Zhi Zeng, Yu-Hao Mi, Ming Zeng, Hao Ma, Qian Yue, Jian-Ping Cheng, Jun-Li Li, Rui Qiu, Hui Zhang   

  1. Key Laboratory of Particle and Radiation Imaging (Ministry of Education) and Department of Engineering Physics, Tsinghua University, Beijing 100084, China
  • Contact: Hao Ma E-mail:mahao@tsinghua.edu.cn
  • Supported by:

    This work is partly supported by National Natural Science Foundation of China (Nos. 11175099 & 11355001) and Tsinghua University Initiative Scientific Research Program (Nos. 20151080354 & 2014Z21016).

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Zhi Zeng, Yu-Hao Mi, Ming Zeng, Hao Ma, Qian Yue, Jian-Ping Cheng, Jun-Li Li, Rui Qiu, Hui Zhang. Characterization of a broad-energy germanium detector for its use in CJPL.Nuclear Science and Techniques, 2017, 28(1): 7     doi: 10.1007/s41365-016-0162-y
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Abstract:

The broad-energy germanium (BEGe) detector, with the ability of background discrimination using pulse shape discrimination, is a competitive candidate for neutrinoless double beta decay (0νββ) experiments. In this paper, we report our measurements of key parameters for detector modeling in a commercial p-type BEGe detector. Point-like sources are used to investigate energy resolution and linearity of the detector. A cylindrical volume source is used for efficiency calibration. With an assembled device for source positioning and a collimated 133Ba source, the detector is scanned to check its active volume. Using an 241Am point-like source, the dead layer thicknesses is measured at about 0.17 mm on the front and 1.18 mm on the side. The detector characterization is of importance for BEGe detectors to be used in the 0νββ experiments at China JinPing underground Laboratory (CJPL).

Key words: BEGe, Characterization, Dead layer, 0νββ, CJPL