Development of a portable high-resolution gamma-ray spectrometers for nuclear facilities, 2; Long-term stability of TlBr Detector at room temperature

Nogami, Mitsuhiro*; Hitomi, Keitaro*; Ito, Chikara   ; Tsubakiyama, Kunimi*; Watanabe, Kenichi*; Maeda, Shigetaka   

While many studies have been conducted on improving energy resolution and increasing the volume of TlBr detectors, little evaluation has been made on long-term stability. Therefore, in this study, we evaluated the long-term stability of the TlBr detector when it was operated continuously for about 2000 hours, assuming application to an actual nuclear power plant.