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- W1980261139 abstract "Vib-rotational transitions in proton-H2 collisions are treated by making the sudden approximation for the rotational degree of freedom and retaining a full quantum mechanical close-coupling description of the vibrational excitations. The centrifugal sudden parameter is taken as l′ (final orbital angular momentum) in the sudden amplitude since only degeneracy-averaged cross sections are of interest. The strong rotational coupling in this system requires a Legendre polynomial expansion of the orientation dependent sudden T-matrix which greatly simplifies the differential as well as the integral cross section expressions. Numerical results are reported at 4.67 and 10 eV, an energy range in which vibrational excitation increases four-fold and pure rotational excitation in n = 0 decreases by a factor of two. At the lower energy, good agreement is found in the comparison with experimental transition probabilities for the pure rotational excitation apart from a spurious rainbow maximum in the j = 1 → 7 transition which apparently is the result of intermediate vibrational excitations. This effect, which is likely an artifact of the H3+ surface, persists at 10 eV and is also present in the vib-rotational transitions. Rotational excitation is found to be relatively stronger the higher the vibrational excitation and this feature is confirmed by the beam experiments at 10 eV." @default.
- W1980261139 created "2016-06-24" @default.
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- W1980261139 date "1978-07-01" @default.
- W1980261139 modified "2023-09-28" @default.
- W1980261139 title "Combined rotationally sudden and vibrationally exact quantum treatment of proton-H2 collisions" @default.
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- W1980261139 doi "https://doi.org/10.1016/0301-0104(78)85132-5" @default.
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