Response function measurement of layered type CVD single crystal diamond radiation detectors for 14 MeV neutrons
- Graduate School of Engineering, Hokkaido University, N13 W8, Kita-ku, Sapporo 060-8628 (Japan)
Response function measurement of layered-type chemical vapor deposition single crystal diamond radiation detectors for 14 MeV neutrons was carried out. The detector had a layered structure that was composed of a boron-doped diamond layer of 0.5 {mu}m in thickness and a nondoped diamond layer of 20 {mu}m on an inexpensive high pressure and high temperature-type Ib diamond substrate. The detector had energy resolution of 2.6% for 5.5 MeV {alpha} particles. This experiment was mainly carried out in order to understand the present status of the detector as a 14 MeV neutron spectrometer and an extent of charge trapping. As result, a peak caused by the {sup 12}C(n,{alpha}{sub 0}){sup 9}Be reactions was clearly observed; the best energy resolution of 6% as for a synthetic diamond radiation detector was achieved. Detection efficiency was 3.2x10{sup -7} counts/unit neutron fluence. However, taking the energy resolution for {alpha} particles, etc., into account, the energy resolution for 14 MeV neutrons was not so high. Further improvement based on better crystal growth is indispensable.
- OSTI ID:
- 20636690
- Journal Information:
- Review of Scientific Instruments, Vol. 75, Issue 10; Other Information: DOI: 10.1063/1.1787918; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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