Title :
Characterization of thallium bromide chloride crystals for radiation detectors
Author :
Onodera, T. ; Hitomi, K. ; Onodera, C. ; Shoji, T. ; Mochizuki, K.
Author_Institution :
Dept. of Electron. & Intell. Syst., Tohoku Inst. of Technol., Sendai, Japan
Abstract :
Thallium bromide chloride (TlBrxCl1-x) crystals have been evaluated as a material used for fabrication of room temperature radiation detectors. In this study, TlBrxCl1-x crystals with various chlorine (Cl) concentrations were grown by the travelling molten zone method and the detectors were fabricated from the crystals. The optical properties of the crystals were evaluated by measuring the transmittances. The charge transport properties were characterized by the Hecht analysis. The band gap energy of the crystals proportionally increased with Cl concentration. Mobility-lifetime products (μ(τ) of the crystals decreased with increasing Cl concentration.
Keywords :
carrier lifetime; carrier mobility; crystal growth from melt; doping profiles; energy gap; light transmission; optical properties; semiconductor counters; semiconductor doping; semiconductor growth; Hecht analysis; TlBrxCl1-x; band gap energy; charge transport properties; chlorine concentrations; mobility-lifetime products; optical properties; radiation detectors; room temperature radiation detector fabrication; thallium bromide chloride crystals; transmittance; travelling molten zone method; Crystals; Detectors; Diffraction; Gold; Optical device fabrication; Optical diffraction;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2011 IEEE
Conference_Location :
Valencia
Print_ISBN :
978-1-4673-0118-3
DOI :
10.1109/NSSMIC.2011.6154728
