SEARCH Articles Figures Tables Approximate Atomic Transition Amplitudes Born-Oppenheimer approximation radiationless transitions Born-Oppenheimer approximation transition state theory Born-Oppenheimer approximations vibrational transitions Condon approximation radiationless transitions Electronic transitions Born-Oppenheimer approximation Hartree-Fock approximation transition metal atoms Hartree-Fock approximation transition metal electronic structure Hartree-Fock approximation transition-metal complexes Radiationless transitions approximation Single-Transition Approximation Transition monopole approximation Transition state approximate correction