The free exciton emission bands in CdS are investigated with static uniaxial stress, σ , applied to the crystal. The measured peak shifts and intensity ratios as function of stress σ ∥ c and σ ⟂ c are interpreted on the basis of first order perturbation theory and lead to quantitative information on the stress‐induced mixing of exciton states. In particular, the A(Γ 6 )‐exciton, stress‐allowed for σ ⟂ c , is studied and the corresponding mixing matrix element is determined. For both stress directions a Boltzmann distribution of the exciton concentrations is found.
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Goede et al. (1972) studied this question.
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