Impurity-doped GaSe radiation detector evaluated at 100°C

The pulse height distribution for 5.5 MeV α particles from 241 Am was measured using a GaSe detector doped with 0.1 at.% Sn at 100°C and compared with that measured at room temperature. It was found that the energy resolution at 100°C was 8.3% which was as good as that at room temperature. The temperature dependence of the leakage current of the detector was also measured for the applied voltage of 50 V and found to have a small value of 60 nA at 100°C.