2024-03-28T08:25:53Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/57222022-11-17T02:08:08Zhdl_2115_20045hdl_2115_139Response function measurement of layered type CVD single crystal diamond radiation detectors for 14 MeV neutronsKaneko, J. H.Teraji, T.Hirai, Y.Shiraishi, M.Kawamura, S.Yoshizaki, S.Ito, T.Ochiai, K.Nishitani, T.Sawamura, T.421Response 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 µm in thickness and a nondoped diamond layer of 20 µm on an inexpensive high pressure and high temperature-type Ib diamond substrate. The detector had energy resolution of 2.6% for 5.5 MeVα 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 12C(n,α0)9Be reactions was clearly observed; the best energy resolution of 6% as for a synthetic diamond radiation detector was achieved. Detection efficiency was 3.2×10(–7) counts/unit neutron fluence. However, taking the energy resolution for α particles, etc., into account, the energy resolution for 14 MeV neutrons was not so high. Further improvement based on better crystal growth is indispensable.American Institute of PhysicsJournal Articleapplication/pdfhttp://hdl.handle.net/2115/5722https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/5722/1/RSI75-10.pdf0034-6748Review of Scientific Instruments7510358135842004-10enginfo:doi/10.1063/1.1787918Copyright © 2004 American Institute of Physicspublisher