Comparison of Neutron Detection Performance of Four Thin-Film Semiconductor Neutron Detectors Based on Geant4

Zhang, Zhongming and Aspinall, Michael (2021) Comparison of Neutron Detection Performance of Four Thin-Film Semiconductor Neutron Detectors Based on Geant4. Sensors, 21: 7930. ISSN 1424-8220

[thumbnail of sensors-21-07930]
Text (sensors-21-07930)
sensors_21_07930.pdf - Published Version
Available under License Creative Commons Attribution.

Download (1MB)


Third-generation semiconductor materials have a wide band gap, high thermal conductivity, high chemical stability and strong radiation resistance. These materials have broad application prospects in optoelectronics, high-temperature and high-power equipment and radiation detectors. In this work, thin-film solid state neutron detectors made of four third-generation semiconductor materials are studied. Geant4 10.7 was used to analyze and optimize detectors. The optimal thicknesses required to achieve the highest detection efficiency for the four materials are studied. The optimized materials include diamond, silicon carbide (SiC), gallium oxide (Ga2O3) and gallium nitride (GaN), and the converter layer materials are boron carbide (B4C) and lithium fluoride (LiF) with a natural enrichment of boron and lithium. With optimal thickness, the primary knock-on atom (PKA) energy spectrum and displacements per atom (DPA) are studied to provide an indication of the radiation hardness of the four materials. The gamma rejection capabilities and electron collection efficiency (ECE) of these materials have also been studied. This work will contribute to manufacturing radiation-resistant, high-temperature-resistant and fast response neutron detectors. It will facilitate reactor monitoring, high-energy physics experiments and nuclear fusion research.

Item Type:
Journal Article
Journal or Publication Title:
Uncontrolled Keywords:
?? interaction of radiation with matterneutron detectionsemiconductorcharge collection efficiencyradiation-hard detectorsgeant4monte carlo simulationbiochemistryatomic and molecular physics, and opticsanalytical chemistryelectrical and electronic engineering ??
ID Code:
Deposited By:
Deposited On:
29 Nov 2021 11:28
Last Modified:
28 May 2024 11:30