Spectral performance of mercuric iodide gamma-ray detectors at elevated temperatures

摘要

The effects of elevated temperatures on the spectral performance of a planar mercuric iodide (HgI_2) gamma ray detector were evaluated at 25°C, 35°C, 45°C and 55°C using two test isotopes. ~(137)Cs at 662 keV and ~(241)Am at 59 keV. Spectral analysis was used to determine the spectral parameters (i.e. %FWHM of the full energy peak, the peak channel position and the peak to background ratio). Spectral performance degraded slightly with increasing test temperatures, but recovered on returning to ambient conditions. The results demonstrate that temperature excursions up to 55°CC minimally degrade the spectral performance of mercuric iodide detectors.