Abstract
Irradiation of CdS∶Cu single crystals with fast electrons in a dose of D ≈ 1017 e/cm2 resulted in strong broadening and shift (toward lower energies) of the fundamental absorption edge. Moreover, the peak-to-peak amplitudes of the dispersion curves of reflection decreased compared with pure samples which received the same dose. Neutron irradiation produced the opposite effect. For the same radiation doses as in the case of pure single crystals (D ≈ 1018 n/cm2) the fundamental absorption edge and the peak-to-peak amplitudes of CdS:Cu samples were less affected by the irradiation than the pure crystals. The experimental results were explained by the nature of the interaction of the Cu atoms with point and three-dimensional defects formed as a result of electron and neutron irradiation.
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