Abstract
An experimental magneto-optical study of the relaxed excited 4T1 level of Mn2+ in ZnS is reported. A strong Jahn-Teller interaction model involving an E-mode is able to explain the positions and intensities of zero-phonon lines in the excitation spectrum versus magnetic field and the magnetically induced circular polarisation. The relaxed excited state was found to be non-resonant and this explains past and present failures to detect EPR optically.
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