Abstract
The growth of large single crystals of cadmium sulphide doped with tellurium, CdS: Te, is reported. These crystals have a high luminescence efficiency for electron-hole recombination at isoelectronic tellurium traps. Their properties are very similar to those of platelet crystals grown in a continuous flow process. Single-photon counting techniques have been used to measure the decay of the luminescence excited by 5·5 MeV α-particles. Thermal quenching is also discussed. It is shown that a combination of a CdS: Te crystal and a silicon photodiode provides a new scintillation counter for γ ray spectroscopy.
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