Vibration and two-photon absorption.

Authors :: Bishop, David M.
Luis, Josep M.
Kirtman, Bernard
Source :: Journal of Chemical Physics; 6/8/2002, Vol. 116 Issue 22, p9729, 11p, 6 Charts
Publication Year :: 2002
Abstract: A treatment of nuclear vibrational motions in two-photon absorption is laid out in detail. Perturbation theory is used to develop working formulas for diatomic molecules and tested for the X[sup 1]&sigma[sup +]-A[sup 1]π transition of carbon monoxide. The results are compared with the exact numerical values. Certain vibrational contributions, not previously recognized, are found to make an important contribution to the two-photon absorption probability. [ABSTRACT FROM AUTHOR]