Franck--Condon factors for the CH+ A 1PI--X1Σ+ transition

Accurate ab initio potential energy curves were used to calculate the vibrational eigenvalues and eigenfunctions for the A 111 and X + electronic states of CR +. The calculated Franck-Condon factors are q(O, 0) = 0.665 and q(l, 0) = 0.249. These are in moderately good agreement with earlier values based on Morse potentials, but they differ markedly from recent values based on Rydberg-Klein-Rees potentials. Subject headings: molecules - transition probabilities