Gamma-ray spectroscopy for TlBr detectors at two different temperatures

Abstract

In this paper, the results of the development of the TlBr poly-crystals for application as gamma radiation detectors are presented. TlBr detectors were fabricated from the crystals purified by the multipass zone refining method and grown by the Bridgman method. 0.3mm thick detectors were prepared and systematic measurements of the current-voltage and height pulse spectra were carried out. The spectrometric performance of the TlBr detector was evaluated by 241Am (59.5keV), 133Ba (80keV) and 57Co (122keV) gamma-ray excitation sources at room and -20C temperatures. No significant difference was observed in the energy resolution between measurements performed in these two different temperatures. The stability of TlBr radiation detectors at reduced temperatures was slightly better than at room temperature.