Vibronic Coupling. I. Mathematical Treatment for Two Electronic States

摘要: A general mathematical treatment of vibronic coupling two electronic states in molecules and dimers is presented. The 2×2 matrix Hamiltonian which derived shown to reduce one‐dimensional Hamiltonians provided a certain minimum amount symmetry present. Some selection rules governing transitions these from the ground state are obtained, showing that spectral distribution hot bands may differ considerably normal when occurs. special model considers arise single mode vibration Two limiting cases can be treated approximately by perturbation theory considered detail. These give rise ``pseudo Jahn‐Teller effect'' vibrational borrowing different limits.