THE ADIABATIC MODEL OF ELECTRONIC AND VIBRONIC STRUCTURE OF 2E, 2T1 AND 4T2 SPIN ORBIT COUPLED STATES - RUBY FLUORESCENCE DECAY TIME UNDER PRESSURE

This paper presents the calculations of the energy structure of the three lowest lying excited states of Cr3+ in the ligand field of octahedral symmetry. We have considered the spin-orbit interaction and the strong coupling of the electrons with the full symmetry lattice vibrations. The calculations are performed in the adiabatic manner so first we have diagonalized the electronic Hamiltonian to obtain the configuration coordinate dependent "electronic energies" and next solved the oscillation problem to obtain the adiabatic energies and wave functions. The model was used to analyze the pressure dependence of ruby fluorescence decay time.