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Ma JL, Yue Q, Wang Q, Li J, Wong HT, Lin ST, Liu SK, Wang L, Jiang H, Yang LT, Jia LP, Chen JH, Zhao W. Study of inactive layer uniformity and charge collection efficiency of a p-type point-contact germanium detector. Appl Radiat Isot 2017; 127:130-136. [PMID: 28586704 DOI: 10.1016/j.apradiso.2017.05.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 05/14/2017] [Accepted: 05/28/2017] [Indexed: 11/24/2022]
Abstract
The characteristics of the surface inactive layer of a 1-kg-mass p-type point-contact germanium detector were studied. The thickness of the inactive layer and its uniformity on the top and lateral surfaces were measured. A charge collection efficiency function was developed according to the Monte Carlo simulation to describe the charge collection capacity along the depth within this inactive layer. In the energy range below 18keV, the surface, bulk, and total spectra of 57Co, 133Ba, 137Cs, and 60Co from simulations based on the charge collection efficiency function were well consistent with those from experiments.
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Affiliation(s)
- J L Ma
- Department of Physics, Tsinghua University, Beijing 100084, China; Key Laboratory of Particle and Radiation Imaging (Ministry of Education) and Department of Engineering Physics, Tsinghua University, Beijing 100084, China
| | - Q Yue
- Key Laboratory of Particle and Radiation Imaging (Ministry of Education) and Department of Engineering Physics, Tsinghua University, Beijing 100084, China.
| | - Q Wang
- Department of Physics, Tsinghua University, Beijing 100084, China; Center for High Energy Physics, Tsinghua University, Beijing 100084, China; Collaborative Innovation Center of Quantum Matter, Beijing 100084, China
| | - J Li
- Key Laboratory of Particle and Radiation Imaging (Ministry of Education) and Department of Engineering Physics, Tsinghua University, Beijing 100084, China
| | - H T Wong
- Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
| | - S T Lin
- College of Physical Science and Technology, Sichuan University, Chengdu 610064, China
| | - S K Liu
- Key Laboratory of Particle and Radiation Imaging (Ministry of Education) and Department of Engineering Physics, Tsinghua University, Beijing 100084, China
| | - L Wang
- Key Laboratory of Particle and Radiation Imaging (Ministry of Education) and Department of Engineering Physics, Tsinghua University, Beijing 100084, China
| | - H Jiang
- Key Laboratory of Particle and Radiation Imaging (Ministry of Education) and Department of Engineering Physics, Tsinghua University, Beijing 100084, China
| | - L T Yang
- Department of Physics, Tsinghua University, Beijing 100084, China; Key Laboratory of Particle and Radiation Imaging (Ministry of Education) and Department of Engineering Physics, Tsinghua University, Beijing 100084, China
| | - L P Jia
- Key Laboratory of Particle and Radiation Imaging (Ministry of Education) and Department of Engineering Physics, Tsinghua University, Beijing 100084, China
| | - J H Chen
- Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
| | - W Zhao
- Key Laboratory of Particle and Radiation Imaging (Ministry of Education) and Department of Engineering Physics, Tsinghua University, Beijing 100084, China
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