Broadening and Shift of the Lines of Molecular Ions by Collisions with Neutral Perturbers
Year: 1994
Authors: Buffa G., Tarrini O., Cazzoli G., Dore L.
Autors Affiliation: Dipartimento di fisica dell’universitą di Pisa
Dipartimento di Chimica dell’universitą di Bologna
Abstract: We present a theoretical model for studying the shape of the rotational lines of molecular ions perturbed by collisions with neutral species. This model shows that the interaction between the ionic monopole and the multipole moments of the perturber has no role in the collisional relaxation of the lines. The effect of the ionic monopole is restricted to that of inducing a polarization of the neutral perturbers that can cause relaxation by interaction with the other permanent moments of the absorbing ion. We also present, for HCO+ perturbed by argon, an experimental study of the pressure broadening and shift of the rotational lines J = 1 <-- 0, 2 <-- 1, and 4 <-- 3. The agreement between theory and experiment is satisfactory. Journal/Review: PHYSICAL REVIEW A
Volume: 49 Pages from: 3557 to: 3565
KeyWords: pressure broadening; pressure shift; ionsDOI: 10.1103/PhysRevA.49.3557Citations: 25data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-10References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here