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

Journal Article · Fri Oct 01 04:00:00 EDT 2004 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1787918· OSTI ID:20636690

Kaneko, J H; Teraji, T; Hirai, Y; Shiraishi, M; Kawamura, S; Yoshizaki, S; Ito, T; Ochiai, K; Nishitani, T; Sawamura, T ^[1]

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1. 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, Journal Name: Review of Scientific Instruments Journal Issue: 10 Vol. 75; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALPHA PARTICLES
BERYLLIUM 9
CARBON 12
CHEMICAL VAPOR DEPOSITION
CRYSTAL GROWTH
DOPED MATERIALS
ENERGY RESOLUTION
MEV RANGE 10-100
MONOCRYSTALS
NEUTRON DETECTION
NEUTRON FLUENCE
NEUTRON SPECTROMETERS
RADIATION DETECTORS
RESPONSE FUNCTIONS
THICKNESS