Phenomena Observed with a Ge (Li) Detector

Abstract

  The following phenomena were observed using a Ge (Li) detector whose resolution was already degraded by neutron irradiation : (1) The resolution of the detector gradually worsened after applying the bias voltage. However, it recovered when the detector was kept at zero bias for few hours. (2) Signals sometimes abruptly changed their positions toward lower energy sides after several minutes. They took about 10－100 minutes in order to return to their original positions. (3) A double-peaking phenomenon was observed when irradiated in an intense γ ray field.