Development of nuclear spectroscopy systems using high resolution semiconductor detector

Two kinds of spectrometers have been developed at Dalat Nuclear Research Institute. In this paper an XRF spectrometer and Compton suppression and pair spectrometers have been described. The XRF spectrometer consists of Si(Li) detector and Dalat Electronics. Compton suppression and pair spectrometers consist of a 20% high purity germanium gamma ray detector inserted into two large NaI(TI) shielding detectors, coupled with Compton suppression and pair electronics of Dalat. Improving the resolution of XRF spectrometer and increasing the peak to Compton ratio of gamma ray spectrometers have been done at Dalat Nuclear Research Institute. Block diagram of systems and results of testing spectroscopy systems have been given.