Optimization of a high-resolution collimator for a CdTe detector: Monte Carlo simulation studies

Cadmium telluride semiconductor detector for improved spatial and energy resolution radioisotopic imaging

“…[ 17 ] These detectors, in comparison with the scintillators, have a lower carrier creation energy and low scatter count. [ 7 21 ] Unfortunately, Si with a low stopping power for high-energy photons is restricted to low-energy photons. Besides, Ge works at cryogenic temperatures because of its small band gap.…”

“…[ 17 ] CdTe and CdZnTe are probable materials for using in X and gamma rays detectors. [ 21 24 ] The strong absorption and great detection efficiency for energetic photons were provided by the high effective atomic number and density. [ 11 ] Compound semiconductors are commonly taken from the atoms of Groups II and VI (e.g.…”

“…[17] When the material reaches to the semi-insulating condition with electrical compensation, the wide band gap of the materials permits to the formation of highly resistive tools, great depletion depths, and a few leakage currents. [9,21,[25][26][27][28] Most band gaps for semiconductors as radiation detectors fall within the ranges of 0.7 to about 3 eV. [2] Ogawa et al assessed an ultra-high resolution SPECT system equipped with a semiconductor detector.…”