Computer Science
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jqsrt..32...81h&link_type=abstract
Journal of Quantitative Spectroscopy and Radiative Transfer (ISSN 0022-4073), vol. 32, July 1984, p. 81-89.
Computer Science
Gas Spectroscopy, Optical Properties, Resonant Frequencies, Spectral Line Width, Absorption Spectra, Gas Density, Line Shape, Line Spectra, Many Body Problem, Optical Resonance, Refractivity, Self Absorption
Scientific paper
A semi-classical theory of selective dispersion is developed to describe the complex refractive index of a high-density gas as a function of frequency in the near neighborhood of a resonance line. The many-body problem of dipole-dipole interaction is solved in the quasi-static limit by neglecting collecive excitation-transfer effects of higher orders. In agreement with reflection experiments on dense metallic vapours, the theory gives an asymmetrical absorption profile with a steeper blue wing, a line half-width that increases with a power of density larger than one, a shift towards longer wavelengths aproximately proportional to the density, and a maximum that decreases with increasing density.
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