Comparison of 5 and 10mm thick HgI2 pixelated g-ray spectrometers

HgI2 detectors fabricated with pixelated anodes were tested as potential room temperature spectrometers. Spectra were obtained with 5 and 10mm thick devices, and their results were compared. The 5mm thick devices showed some effect of the anode weighting potential, while the 10mm thick devices showed the effects of charge diffusion/sharing and electron trapping. A resolution near 1.4 % FWHM using a 137Cs source was achieved after correcting for the interaction depth within the detector. The resolution from individual depths was as low as approximately 1.1 % FWHM