Stark broadening of the Hα line of hydrogen at low densities: quantal and semiclassical results
- 28 April 1984
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 17 (8) , 1477-1489
- https://doi.org/10.1088/0022-3700/17/8/010
Abstract
Stark profiles of the H alpha lines of hydrogen are computed at low densities (from 1010 to 1013 cm-3) in the 'impact' theory. By a comparison with quantal results the authors show that a simple semiclassical perturbational approach with appropriate cutoffs is sufficient to give accurate profiles in the line centre. Neglecting the natural broadening and the fine-structure effects, they prove that the electronic broadening is negligible and that the profile has a Lorentzian shape, and they give an analytical expression of the half width.Keywords
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