Peak shifted properties of the “low background NaI(Tl) detectors”: An experimental study of response function behavior in different temperature and acquisition time

Due to the necessity of using low background NaI detector in sensitive and accurate measurements, study on the response function variations in different conditions is very important. These types of detectors have different responses in various measurement conditions, including time, temperature and high voltage. In this study, the response function of 76 B 76 LB NaI (SCIONIX) in different conditions is discussed. According to the channel shifting in these detectors and its direct effect on degrading the resolution, the most convenient measurement condition for these detectors, is proposed. Finally, it is recommended that before long-time measurements a “waiting time” is needed to avoid the channel shifting effects. •The response function of low background NaI detector is investigated in various temperature/high voltage/acquisition time.•Channel shifting is observed in measured spectra.•Proper condition is proposed for low and high count-rate measurements to avoid the effect of channel shifting.