Polycrystalline chemical-vapor-deposited diamond for fast and ultra-fast neutron detection

Polycrystalline CVD diamond detector: Fast response and high sensitivity with large area

“…The increase of the DC just after the irradiation may be due to the intrinsic defects with shallow energy level and we got the similar result in 14.9 MeV neutron detection when the fluence up to 3.7 × 10 10 n/cm 2 . 24 This kind of increasement of DC may not be due to the permanent drift damage of diamond material, and it could be restored at ambient temperature after several hours. 24 The diamond detector should be preserved in dry enviroment, dampness may increase the dark current obviously.…”

“…24 This kind of increasement of DC may not be due to the permanent drift damage of diamond material, and it could be restored at ambient temperature after several hours. 24 The diamond detector should be preserved in dry enviroment, dampness may increase the dark current obviously. (Figure 6(a))…”

“…24 The stopping power of protons in diamond and silicon can be calculated by SRIM2003. 25 ( Figure 3(a)) Energy for creating electron-hole pair is 13 eV in diamond and 3.6 eV in silicon.…”

The Fabrication and Characterization of Ni/4H-SiC Schottky Diode Radiation Detectors with a Sensitive Area of up to 4 cm2

“…We studied the n/γ discrimination of the detectors with a thickness of 20 μm and for the neutrons of 14 MeV and γ-rays of 1.25 MeV using MCNP-4C Code [ 34 ], and the results are shown in Figure 8 . The n/γ discrimination for the neutrons of 14 MeV and the γ-rays of 1.25 MeV is 126, over nine times higher than that of a silicon detector (300 μm in thickness) and seven times higher than that of a diamond detector (300 μm in thickness) according to the results acquired in our former research [ 35 ], respectively. In neutron detection, γ-rays always exist in the background.…”