Title :
Spectroscopic performance of recent TlBr detectors
Author :
Koehler, Will ; Thrall, Crystal ; Zhong He ; Kim, Heonhwan ; Cirignano, Leonard ; Shah, Karan
Author_Institution :
Dept. of Nucl. Eng. & Radiol. Sci., Univ. of Michigan, Ann Arbor, MI, USA
fDate :
Oct. 27 2012-Nov. 3 2012
Abstract :
Having a high atomic number (TI: 81, Br: 35), high density (7.56 g/cm3), and wide band gap (2.68 eV), thalliumbromide is a favorable candidate material for room-temperature semiconductor gamma-ray detectors. Previous work has shown that TlBr detectors with thicknesses of 5 mm can achieve as good as 1 % FWHM energy resolution at 662 keV. In this work, we report on the spectroscopic performance and charge transport properties of thirteen 5-mm-thick TlBr detectors. Experimental results show that it is feasible to construct operational TlBr detectors with 5 mm thicknesses that acheive energy resolution close to 1 % FWHM at 662 keV. However, consistency in device performance remains an issue with the worst detector preforming at 4.5% FWHM at 662 keV.
Keywords :
bromine compounds; energy gap; gamma-ray detection; semiconductor counters; thallium compounds; atomic number; band gap; charge transport; density; electron volt energy 662 keV; room temperature semiconductor gamma-ray detector; size 5 mm; spectroscopic performance; thallium bromide detectors; TlBr spectrometers; alternative room temperature semiconductor;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2012 IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-4673-2028-3
DOI :
10.1109/NSSMIC.2012.6551968
