Bulk Growth and Performance of Cs2HfCl6, Tl2HfCl6, and Tl2ZrCl6 Intrinsic Scintillators

This paper reports on recently successful growths of single, transparent 1.5-inch diameter Cs2HfCl6 (CHC) and 1 inch diameter Tl2HfCl6 (THC) and Tl2ZrCl6 (TZC) scintillators crystals using the vertical Bridgman method as well as their radiometric and scintillation performance and properties. Energy resolution of 4.0% (FWHM) at 662 keV has been obtained for CHC and 4.1% and 4.2% for each THC and TZC respectively. This paper covers gamma-ray non-proportionality, light yield, and decay times for CHC, THC and TZC, respectively.