Diamond radiation detector using a synthetic IIa type mono-crystal

A diamond radiation detector using a synthetic IIa type mono-crystal was developed. An energy resolution of 0.81%, 45 keV, was achieved for 5.486 MeV α particles in a vacuum environment. The ionization energy, ∈Diamond, was estimated as 13.07 eV by calibration with a silicon surface barrier detector. On a preamplifier output signal, a trapping and detrapping effect on holes was observed.