Abstract

Gamma coincidence spectrometers with HPGe detectors are used for environmental research, nuclear reactions (n, g), (n, 2g) due to Compton backgrounds of their gamma spectra are very low. In this work, three types of coincidence spectrometers such as gamma coincidence spectrometer, gamma coincidence spectrometers with TAC and sum coincidence spectrometer using HPGe are described. Some experimental results obtained by using gamma coincidence spectrometers are presented. Especially, taking advantages of the software and hardware of the sum coincidence spectrometer used for research of nuclear reactions (n, g), (n, 2g), we have converted the spectrometer to one with very low background level.