Laboratory absorption strengths and line shape parameters in the 4-0, 5-0, and 6-0 vibration bands of HD

Details Laboratory absorption strengths and line shape parameters in the 4-0, 5-0, and 6-0 vibration bands of HD Laboratory absorption strengths and line shape parameters in the 4-0, 5-0, and 6-0 vibration bands of HD

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983icar...56..176t&link_type=abstract

Icarus (ISSN 0019-1035), vol. 56, Oct. 1983, p. 176-183. Research supported by the Research Corp. and Denison University Researc

Computer Science

7

Absorption Spectra, Deuterium Compounds, Gas Giant Planets, Planetary Atmospheres, Spectral Resolution, Vibrational Spectra, Error Analysis, Line Spectra, Planetary Evolution, Spectrum Analysis

Scientific paper

Experimental values for the visible vibration-dipole bands of HD are improved through a study of weak, unsaturated absorption lines of HD against a well-defined white light continuum at low gas densities between 0.3 and 1.7 amagats. Spectral resolution was high enough to allow recovery of line profiles with only minor corrections for instrumental effects, so line strengths and shapes are determined directly without recourse to theoretical assumptions regarding the curve of growth, and the unusual phenomenon of collision narrowing in HD is directly observed in the line shape for the first time. Accurate line strengths are reported, the behavior of spectral profiles as a function of gas density is discussed, and the pressure shift coefficients are determined. These are compared with previous laboratory work done either at lower spectral resolving power or at higher gas densities.

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