Journal of Physics B: Atomic and Molecular Physics
The vibrational excitation probabilities of H2 in collinear collisions with He are calculated quantum mechanically, using the Fredholm integral method. Important differences are found when the accurate H2 molecular potential of Kolos and Wolniewicz (1968) is used instead of the less accurate Morse potential used extensively in previous work. The approximation of truncating the infinite set of coupled equations describing the collision problems is tested, and an alternative closure approximation is suggested to provide an indication of the effect of truncation on the results.
Drake, Gordon W. F. and Holtg, A. R.. (1975). Improved quantum calculation of the vibrational excitation of H2 in collinear collisions with helium. Journal of Physics B: Atomic and Molecular Physics, 8 (3), 494-502.