https://doi.org/10.1007/s100530050137
Memory effects in speed-changing collisions and their consequences for spectral lineshape: I. Collision regime
Laboratoire de Physique Moléculaire (UMR CNRS 6624) ,
Faculté des Sciences, La Bouloie,
Université de Franche-Comté,
25030 Besancon Cedex, France
Corresponding author: a daniel.robert@univ-fcomte.fr
Received:
9
February
1998
Accepted:
30
March
1998
Published online: 15 June 1998
A consistent approach to the lineshape in the binary collision regime accounting for speed-changing collisions based on a convenient memory function is proposed. The consequences of memory effects on the spectral lineshape, through speed-dependent line broadening and line shifting mechanisms, are studied in detail for the prototype H2-Ar system. The connection between the present memory approach and the analytical model SC + D ("speed changing" and "dephasing" collisions) based on the hard collision approximation is displayed.
PACS: 34.10.+x – General theories and models of atomic and molecular collisions and interactions (including statistical theories, transition state, stochastic and trajectory models, etc.) / 33.70.Jg – Line and band widths, shapes, and shifts
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1998
