Temperature peak-shift correction methods for NaI(Tl) and LaBr3(Ce) gamma-ray spectrum stabilisation

A study of the effect of Al 2 O 3 reflector on response function of NaI(Tl) detector

“…The experimental setup is shown in Figure 1. The photomultiplier tube (PMT) of NaI(Tl) detector is very sensitive to changes in temperature of surroundings (Casanovas et al, 2012). In order to limit this effect, room temperature was maintained in an approximate range of 21-23°C during its operation, and the measurements were not taken for a very long time.…”

Temperature Dependence of NaI(Tl) Radiation Scintillation Detectors’ Characteristics

“…In case of a short time operation in outdoor environment, this technique is not subjected to a significant temperature variation; therefore, it can be operated in the same way as in laboratory. For their continuous operation in outdoor environment, as in the case of continuous monitoring of environmental radiation, they are likely to be impacted by temperature effect [4][5][6].…”

“…Besides the low resolution, the temperature effect is one of the major drawbacks of NaI(Tl) based systems, or for that matter, of all scintillation spectrometers [7]. This effect is derived from the complex temperature dependence of the system [8,9] including temperature dependence of the scintillator's light output [7] and decay time constants [10], the photomultiplier tube's temperature drift [11] and the associated electronic components' temperature behaviour [5]. The most significant contribution of the temperature effect coming from the photomultiplier tube is too difficult to handle [12], so the spectrum processing methods would be the most beneficial way to correct the temperature effect.…”

“…All of correction methods are related to restoring a shifted spectrum recorded under different temperatures to the position of a reference spectrum which allows the restored spectrum to be processed together with the reference spectrum [13], hence eliminating the effect of the change of temperature between their measurements [5,6,9]. The essential condition for spectrum converting methods is the linearity of the overall system that allows to perform linear operations.…”

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

“…The effect of external variations on parameters such as temperature and pressure on NaI scintillator behavior was investigated in a lot of studies (Casanovas et al, 2012(Casanovas et al, , 2013Ianakiev et al, 2007, 2009, Moszyński et al, 2006. But, in the case of low background detectors, these discrepancies are due to channel shifting in the spectra by changing the measurement time and temperature; which worsens the resolution.…”