Curves of growth for van der Waals broadened spectral lines

Details Curves of growth for van der Waals broadened spectral lines Curves of growth for van der Waals broadened spectral lines

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jqsrt..24..289p&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 24, Oct. 1980, p. 289-292.

Computer Science

Line Spectra, Spectral Line Width, Van Der Waals Forces, Spacecraft Reentry, Voigt Effect

Scientific paper

Curves of growth are evaluated for a spectral line broadened by the van der Waals interactions during collisions. The growth of the equivalent widths of such lines is shown to be dependent on the product of the perturber density and the 6/10 power of the van der Waals potential coefficient. When the parameter is small, the widths grow as the 1/2 power of the optical depth as they do for the Voigt profile: but when the parameter is large, they grow as 2/3 power and, hence, faster than the Voigt profile. An approximate analytical expression for the computed growth characteristics is given.

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