Response function measurement of layered type CVD single crystal diamond radiation detectors for 14 MeV neutrons

被引:34
作者
Kaneko, JH
Teraji, T
Hirai, Y
Shiraishi, M
Kawamura, S
Yoshizaki, S
Ito, T
Ochiai, K
Nishitani, T
Sawamura, T
机构
[1] Hokkaido Univ, Grad Sch Engn, Kita Ku, Sapporo, Hokkaido 0608628, Japan
[2] Osaka Univ, Grad Sch Engn, Suita, Osaka 5650871, Japan
[3] Japan Atom Energy Res Inst, Tokai, Ibaraki 3191195, Japan
关键词
D O I
10.1063/1.1787918
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
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 mum in thickness and a nondoped diamond layer of 20 mum 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 C-12(n,alpha(0))Be-9 reactions was clearly observed; the best energy resolution of 6% as for a synthetic diamond radiation detector was achieved. Detection efficiency was 3.2x10(-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. (C) 2004 American Institute of Physics.
引用
收藏
页码:3581 / 3584
页数:4
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