The behaviour of the green edge cathodoluminescence (100 KeV) and photoluminescence emission of cadmium sulphide at liquid helium temperatures has been investigated before and after (i) monoenergetic electron irradiation (in the 100 400 keV range), (ii) heat treatments in sulphur vapour and cadmium vapour. The shorter wavelength emission band (5136.5 AA), attributed to the recombination of free electrons with bound holes does not change significantly under electron irradiation at liquid helium temperatures. The longer wavelength emission band (at approximately (5170 AA), attributed to the recombination of bound electrons with bound holes, is enhanced by irradiation with electrons of sufficient energy to displace sulphur atoms and shifts to higher energies.
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Bryant et al. (1970) studied this question.
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