Fabrication and performance evaluation of GaN thermal neutron detectors with 6LiF conversion layer*
| Autor: | Qinglei Xiu, Jijun Zou, Junbo Peng, Shaotang Wang, Zhifu Zhu, Haiping Zhang, Wenjuan Deng, Bin Tang, Zhidong Wang, Zhijia Sun, Renbo Wang, Qu Jinhui |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Fabrication business.industry Detector General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Neutron temperature Reverse leakage current 0103 physical sciences Deposition (phase transition) Neutron source Optoelectronics Neutron detection 010306 general physics 0210 nano-technology business Layer (electronics) |
| Zdroj: | Chinese Physics B. 29:090401 |
| ISSN: | 1674-1056 |
| DOI: | 10.1088/1674-1056/ab9c05 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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