Electrical properties of polycrystalline mercury iodide film

Abstract: The outstanding properties of mercury iodide make it an ideal material as room temperature X-ray and gamma-ray detectors. For this purpose, electrical and irradiation properties of high quality polycrystalline HgI2 detector are investigated at room temperature under irradiation conditions by 5.9keV X-ray irradiation from a 55Fe source. For (001)-oriented polycrystalline HgI2 film, the dark current is in the order of 10−10 A and photocurrent is in the order of 10−9 A with the applied voltage of 40V. However, a good signal to noise ratio of 4.44 and an energy resolution of 4.1% for X-ray detecting is also obtained. [Copyright &y& Elsevier]