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Technical Brief

Study on Thallium Bromide Radioactive Detector

[+] Author and Article Information
He Li-xia

Radio Chemistry Department,
China Institute of Atomic Energy,
P.O. Box 275-25,
Beijing, 102413, China
e-mail: 59998058@qq.com

Hao Xiao-yong

Nuclear Technology Department,
China Institute of Atomic Energy,
P.O. Box 275-25,
Beijing, 102413, China
e-mail: hxy171217@163.com

He Gao-kui

Nuclear Technology Department,
China Institute of Atomic Energy,
P .O. Box 275-25,
Beijing, 102413, China
e-mail: hegk2012@hotmail.com

Manuscript received September 12, 2017; final manuscript received December 2, 2018; published online March 15, 2019. Assoc. Editor: Jay F. Kunze.

ASME J of Nuclear Rad Sci 5(2), 024501 (Mar 15, 2019) (2 pages) Paper No: NERS-17-1115; doi: 10.1115/1.4042357 History: Received September 12, 2017; Revised December 02, 2018

Abstract

Thallium bromide (TlBr) is a compound semiconductor material, which can be used for X-ray and gamma-ray detectors and can be used at room temperature. It has excellent physical properties, high atomic number and density, wide bandgap (B = 2.68 eV), and low ionization energy. Compared with other X-ray and gamma-ray detection materials, TlBr devices have high detection efficiency and excellent energy resolution performance. So TlBr is suitable for housing in small tubes or shells, and it can be widely used in nuclear material measurement, safeguards verification, national security, space high-energy physics research, and other fields. Based on the fabrication of TlBr prototype detector, this paper focuses on the device fabrication and signal acquisition technology. Gamma-ray spectrum measurements and performance tests are carried out with AM-241 radioactive source. The results show that the special photoelectric peak of 59.5 keV is clearly visible, and the optimal resolution is 4.15 keV (7%).

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