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Spin-Allowed Vibronic Transitions in Molecules: a Refined Treatment of Vibrationally-Structured Electronic Spectra and of Internal Conversion within the Adiabatic Approximation
By making use of second-order Herzberg-Teller approach within the adiabatic approximation the vibronic transition moments are derived for intramolecular spin-allowed radiative and non-radiative processes. The differences to the hitherto existing method are presented and discussed.