title: Detection and Electrical Properties of Cd1-xZnxTe Detectors at Elevated Temperatures.
abstract: We have studied the behavior of Cd1-xZnxTe detectors in the temperature range 24-70°C. The detector count rate stability and leakage currents are presented as a function of voltage, time, and temperature. Detector polarization due to bulk and surface effects leading to a decreased leakage current was observed. At 70°C, the position of the 32 keV photopeak of 133Ba was stable with time. The peak position varies within only 3 keV, and the peak quality factor varied between 0.31 and 0.41, for a 24 h period of operation at a 60 V bias. The net count to total count ratio was also stable, with values varying between 0.56 and 0.59. The net count to total count ratio decreased from 0.78 at 25°C to 0.71 at 60°C. The conclusion is that Cd1-xZnxTe is a promising material for gamma ray detection at temperatures above room temperature.
authors.affiliation: Center for Photonic Materials and Devices, Department of Physics, Fisk University, Nashville,Tennessee 37208.
authors.forename: S U
authors.initials: SU
authors.lastname: Egarievwe
authors.forename: K T
authors.initials: KT
authors.lastname: Chen
authors.forename: A
authors.initials: A
authors.lastname: Burger
authors.forename: R B
authors.initials: RB
authors.lastname: James
authors.forename: C M
authors.initials: CM
authors.lastname: Lisse