Power-law dependence of the pressure broadening of spectral lines on temperature

Details Power-law dependence of the pressure broadening of spectral lines on temperature Power-law dependence of the pressure broadening of spectral lines on temperature

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...208..357b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 208, no. 1-2, Jan. 1989, p. 357-360.

Astronomy and Astrophysics

Astrophysics

Adiabatic Conditions, Lennard-Jones Potential, Phase Shift, Spectral Line Width, Stellar Temperature, Energy Levels, Helium, Neon, Stellar Atmospheres, Temperature Dependence

Scientific paper

Temperature variations of the widths of pressure-broadened spectral lines in a wide temperature range are examined on the basis of a power-law relation in the framework of the adiabatic phase shift theory. It is shown that the temperature-dependence index can be related to the details of interatomic potential curves. Model calculations performed for a Lennard-Jones potential indicate that some caution is necessary when the power law dependence is used as a scaling law.

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