Effect of temperature on the scintillation properties of pure LaCl3 and Cs2LiYCl6:Ce crystals for neutron spectroscopy

被引：0

作者：

Ahn, Seon-Woo ^{[1
]}

Luan, Nguyen Thanh ^{[1
]}

Vuong, Phan Quoc ^{[1
]}

Nam, U. W. ^{[2
]}

Kim, H. J. ^{[1
]}

机构：

[1] Kyungpook Natl Univ, Dept Phys, Daegu, South Korea

[2] Korea Astron & Space Sci Inst, Space Sci Div, Daejeon 34055, South Korea

来源：

JOURNAL OF INSTRUMENTATION | 2024年 / 19卷 / 11期

基金：

新加坡国家研究基金会;

关键词：

Neutron detectors (cold; thermal; fast neutrons); Gamma detectors (scintillators; CZT; HPGe; HgI etc); Particle identification methods; Spectrometers; PULSE-SHAPE DISCRIMINATION; CLYC;

D O I：

10.1088/1748-0221/19/11/P11005

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The Lunar Vehicle Radiation Dosimeters (LVRAD) project, run by the Korea Astronomy and Space Science Institute, is currently in the detector R&D phase. Its mission is to measure the radiation exposure experienced by astronauts on the lunar surface and to search for water and radioactive isotopes. This study focuses on inorganic scintillator R&D for neutron spectroscopy, which is essential for the LVRAD project. Two candidates, pure LaCl3 and Cs2LiYCl6:Ce enriched with 95% 6 Li (CLYC-6) detectors, were investigated in this work. Though their neutron spectroscopy performance meets radiation hardness requirements, the temperature-dependent performance of the detectors needs to be clearly understood to ensure reliable operation in space. Therefore, the performance of pure LaCl3 and CLYC-6 detectors was investigated for working temperatures ranging from - 30 degrees C to + 50 degrees C. The dimensions of the scintillators used for measurements were Phi 1.5 inch x 1.0 inch for pure LaCl3 and Phi 1.5 inch x 1.5 inches for CLYC-6. Scintillation performance was measured using a Hamamatsu H7195 photomultiplier tube with a 500 MHz flash analog-to-digital converter. The detectors were operated in a large temperature and humidity chamber across a temperature range from - 30 degrees C to + 50 degrees C, and the temperature dependence of the pulse shape discrimination performance for fast and thermal neutrons was measured using pure LaCl3 and CLYC-6, respectively. The effect of the temperature on the absolute light yield, energy resolution, and decay times was also measured. Based on the results, the pure LaCl3 and CLYC-6 detectors proved suitable for neutron spectroscopy for the LVRAD project.

引用

页数：19

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