Efficiency and resolution of HPGe and NaI(Tl) detectors using gamma-ray spectroscopy

Abstract

The energy dependence of efficiency and resolution of HPGe and NaI(Tl) detectors using gamma-ray spectroscopy were investigated in this paper. It was found that the resolution of the detector was directly proportional to the energy of gamma-ray and its efficiency was exponentially proportional to the gamma-ray energy. The resolution of HPGe detector (GC2018, diameter 60.5 mm and length 31.5 mm) is better than NaI(Tl) detector (ORTEC 905-3, size 2’’ × 2’’) and efficiency of NaI(Tl) is larger than HPGe detector.   Key words: HPGe, NaI(Tl), gamma ray, resolution, efficiency.