Large Volume HgI2 Gamma‐Ray Spectrometers

This paper demonstrates the enhanced capability of single polarity charge sensing, the 3‐dimensional position sensing technique, developed at the University of Michigan and previously successfully demonstrated on CdZnTe detectors, to improve the spectroscopic performance of HgI2 and to extend its range for spectrometry to an unprecedented thickness of 10 mm. Energy resolutions of close to 1% FWHM at 662 keV gamma‐ray energy were obtained from individual depth locations underneath pixel anodes, and 1.4–2.0% FWHM energy resolutions from 5 out of 6 tested pixel anodes on two 10 mm thick detectors. © 2002 American Institute of PhysicsPeer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/87582/2/113_1.pd