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A partially correlated strong collision model for velocity-and state-changing collisions application to Ar-broadened HF rovibrational line shape

AuthorsJoubert, P.; Bonamy, J.; Robert, D.; Doménech, José Luis ; Bermejo, Dionisio
Issue Date1999
PublisherPergamon Press
CitationJournal of Quantitative Spectroscopy and Radiative Transfer 61: 519- 531 (1999)
AbstractHigh-resolution tunable laser measurements of rovibrational line shapes in Arbroadened HF [A.S. Pine, J. Chem. Phys., 1994, 101, 3444] have shown the need of partially correlated Dicke narrowing models to accurately describe the observed asymmetries. A strong collision model accounting for both velocity-and state-changing mechanisms (VCD) and phase-changing ones (D), is presented. The resulting line shape justifies, on a physical basis, the empirical model previously used to interpret the observed features. The present partially correlated strong collisional model leads to a clearer interpretation of the characteristic parameters determined from the experiment for HF-Ar. Further theoretical calculations and experiments show that the residual discrepancies for the first rovibrational lines cannot be attributed to the speed dependence of the collisional line shape parameters. © 1999 Elsevier Science Ltd. All rights reserved.
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