期刊
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
卷 67, 期 6, 页码 1027-1031出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TNS.2020.2996276
关键词
Neutrons; Temperature measurement; Gamma-rays; Scintillators; Powders; Crystal growth; Crystal growth; neutron detectors; organic scintillators
资金
- Japan Society for the Promotion of Science (JSPS) KAKENHI [18K14135]
- Japan Science and Technology Agency (JST), through the Competitive Funding Programs A-STEP (Adaptable & Seamless Technology Transfer Program through Target-Driven Research and Development) [JPMJTS1521]
- Iketani Science and Technology Foundation
- Grants-in-Aid for Scientific Research [18K14135] Funding Source: KAKEN
Carbazole crystals were grown using self-seeding vertical Bridgman technique, and the scintillation properties for neutron detection were investigated. Results of powder X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analyses indicated the single phase of the grown carbazole crystal with orthorhombic structure. Photo- and radio-luminescence measurements were carried out, and maxima of both emission peaks were at 420 nm. The light yield under 5.5-MeV alpha-ray irradiation was estimated to be 1.87 times higher than that of lithium glass GS-20. The scintillation decay time under neutron irradiation was estimated to be 11.4 +/- 0.3 ns. It follows from the temperature dependence measurements that the light output under 662-keV gamma-ray excitation decreases with increasing temperature.
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