# VIBRATIONAL DEPENDENCE OF HYDROGEN-BROADENED HALFWIDTHS OF WATER VAPOR TRANSITIONS

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 Title: VIBRATIONAL DEPENDENCE OF HYDROGEN-BROADENED HALFWIDTHS OF WATER VAPOR TRANSITIONS Creators: Gamache, Robert R.; Lynch, R. Issue Date: 1996 Publisher: Ohio State University Abstract: The pressure broadened halfwidth of water vapor transitions in the ground, $\nu_{2}$, $\nu_{1}$, and $\nu_{3}$ bands are calculated with hydrogen as the perturbing species using the fully complex Robert and Bonamy $theory.^{a,b}$ The assumed intermolecular potential is a combination of electrostatic, Lennard-Jones 6-12 atom-atom (expanded to 4th order), induction, and dispersion terms. The results are compared with the measurements of Brown and Plymate $^{c}$ and the vibrational dependence of the halfwidths investigated. Description: $^{a}$D. Robert and J. Bonamy, ""Short range force effects in semiclassical molecular line broadening calculations"", J. Phys. (Paris) 40,923 (1979). $^{b}$R. Lynch, R. R. Gamache, and S. P. Neshyba, Fully Complex Implementation of the Robert-Bonamy Formalism: Halfwidths and Line Shifts of $H_{2}O$ Broadened by $N_{2}$, submitted to J. Chem. Phys. November, 1995. $^{c}$L. R. Brown and C. Plymate, in press, JQSRT (1995). Author Institution: Department of Environmental Earth, and Atmospheric Sciences and Center for Atmospheric Research, University of Massachusetts; Wentworth Institute of Technology, 550 Huntington Ave., Boston, MA 02135 URI: http://hdl.handle.net/1811/13748 Other Identifiers: 1996-WG-08