Pressure Broadening of Rotational Lines: Sudden Perturbation Approximation
- 1 May 1967
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 46 (9) , 3429-3437
- https://doi.org/10.1063/1.1841235
Abstract
A treatment, within the framework of the sudden perturbation approximation of time‐dependent perturbation theory, of the pressure broadening of rotational transitions is presented. The Lorentz line‐shape expression is derived in the limit of low pressures, and explicit expressions for the frequency‐shift and linewidth parameters are given in terms of the intermolecular potential. Detailed comparison to other perturbation theories of line broadening is made.Keywords
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