Abstract
The properties required for γ-ray detection of single-crystal Cadmium Manganese Telluride (Cd 1− x Mn x Te) are investigated and samples are evaluated as room temperature radiation detectors. Undoped Cd 1− x Mn x Te crystals are characterised using sub band gap IR microscopy mapping of extended defects, room temperature photoluminescence band-gap measurements, IV measurements and α particle spectroscopy. The band gap energy calculated from room temperature near-band-edge luminescence was found to be 1.70±0.01 eV, corresponding to a manganese fraction in the sample of x=0.13. The hole mobility-lifetime product was measured at 150 K and was found to be of the order of 1×10 −5 cm 2/V.
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