Title :
Characterization of Traveling Heater Method (THM) Grown Cd0.9Zn0.1Te Crystals
Author :
Chen, Henry ; Awadalla, Salah A. ; Mackenzie, Jason ; Redden, Robert ; Bindley, Glenn ; Bolotnikov, A.E. ; Camarda, G.S. ; Carini, G. ; James, R.B.
Author_Institution :
Redlen Technologies, Sidney
Abstract :
High-performance semi-insulating single crystals of n-type (CZT) were grown using the traveling heater method (THM). X-ray and -ray detector configurations fabricated from this material have a room-temperature mean energy resolution of 4.3% FWHM for a source (122 keV) and uniform pixel-to-pixel response on monolithic 20205 pixellated detectors. Energy resolution of 1% FWHM for (662keV) has been measured on virtual Frisch-grid 4411 devices useful for homeland security applications. Additional characterization techniques including mobility-lifetime measurements, infrared microscopy, X-ray topography, and OPTICAL Deep Level Transient Spectroscopy (ODLTS) have demonstrated the superior quality of this THM CZT.
Keywords :
II-VI semiconductors; X-ray microscopy; cadmium compounds; carrier lifetime; carrier mobility; crystal growth from solution; deep level transient spectroscopy; position sensitive particle detectors; semiconductor counters; semiconductor growth; zinc compounds; 137Cs; 57Co source; Cd0.9Zn0.1Te - Interface; FWHM; ODLTS; Optical Deep Level Transient Spectroscopy; THM; X-ray detector configuration; X-ray topography; characterization techniques; gamma-ray detector configuration; high-performance semiinsulating single crystals; homeland security applications; infrared microscopy; mobility-lifetime measurements; monolithic pixellated detectors; pixel-to-pixel response; room-temperature mean energy resolution; temperature 293 K to 298 K; traveling heater method; virtual Frisch-grid devices; Crystalline materials; Crystals; Energy measurement; Energy resolution; Infrared spectra; Optical microscopy; Surfaces; Terrorism; X-ray detection; X-ray detectors; CZT; CdZnTe; Optical Deep Level Transient Spectroscopy (ODLTS); Te inclusion; Traveling Heater Method; homeland security; medical imaging; pixellated detectors;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2007.902369
