Radiation effect of bismuth germanate induced by fast neutrons

The radiation effect of bismuth germanate induced by 14MeV neutrons has been studied by using techniques of nuclear radiation detection. Substantial changes in pulse height as well as in energy resolution of the 137Cs photopeak followed by spontaneous recovery were observed and measured after irradiation. The radioactivities observed along with the above radiation damage have been carefully analyzed and identified with those from neutron activation.