Abstract
Photon-stimulated currents (PSC) and thermally stimulated currents (TSC) have been measured in red mercuric iodide ( alpha -Hgl2) single crystals grown in our laboratory from tetrahydrofurane- alpha -Hgl2 saturated solution, dimethyl sulphoxide-methanol- alpha -Hgl2 saturated solution and from a polymer-controlled vapour phase. PSC measurements helped in determining uniquely the activation energies and nature (electron or hole) of different trapping levels in these crystals. Subsequently, by a comparative study of TSC and PSC measurements, the capture cross sections have been determined uniquely. Finally, after estimating the trap densities, an attempt has been made to predict the influence of different trapping levels on the performance of the detectors fabricated out of the three types of crystal.
Published Version
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