Chinese Physics B, Volume. 29, Issue 9, (2020)
Fabrication and performance evaluation of GaN thermal neutron detectors with 6LiF conversion layer
A GaN-based pin neutron detector with a 6LiF conversion layer was fabricated, and can be used to detect thermal neutrons. Measurement of the electrical characteristic of the GaN-based pin neutron detector showed that the reverse leakage current of the neutron detector was reduced significantly after deposition of a 6LiF conversion layer on the detector surface. The thermal neutrons used in this experiment were obtained from an 241Am–Be fast neutron source after being moderated by 100-mm-thick high-density polyethylene. The experimental results show that the detector with 16.9-μm thick 6LiF achieved a maximum neutron detection efficiency of 1.9% at a reverse bias of 0 V, which is less than the theoretical detection efficiency of 4.1% calculated for our GaN neutron detectors.
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Zhifu Zhu, Zhijia Sun, Jijun Zou, Bin Tang, Qinglei Xiu, Renbo Wang, Jinhui Qu, Wenjuan Deng, Shaotang Wang, Junbo Peng, Zhidong Wang, Bin Tang, Haiping Zhang. Fabrication and performance evaluation of GaN thermal neutron detectors with 6LiF conversion layer[J]. Chinese Physics B, 2020, 29(9):
Received: May. 3, 2020
Accepted: --
Published Online: Apr. 29, 2021
The Author Email: Sun Zhijia (jjzou@ecit.cn)