Argon-broadened line parameters in the ν3 band of 12CH4.

Details Argon-broadened line parameters in the ν3 band of 12CH4. Argon-broadened line parameters in the ν3 band of 12CH4.

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997jqsrt..57..177g&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 57, issue 2, pp. 177-196

Physics

12

Methane: Line Broadening, Methane: Planetary Atmospheres

Scientific paper

Prompted by improved measurements of collisional line shapes in the ν3 band P, Q and R branches of 12CH4, The author has performed semi-classical line broadening calculations for methane perturbed by argon. He has used the theoretical approach developed by Robert and Bonamy (1979) as an extension of the well-known Anderson-Tsao-Curnutte theory. The semi-classical theory as reformulated here is shown to fully account for the tetrahedral symmetry of methane type molecules. The variation of argon-broadened linewidth coefficients in the ν3 band of 12CH4 with the branch, J, symmetry and energy level fine structure is discussed.

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