Stark broadening of the hydrogen Hαline at low densities: fine structure and spontaneous emission effects
- 14 April 1985
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 18 (7) , 1297-1306
- https://doi.org/10.1088/0022-3700/18/7/011
Abstract
Taking the Halphaline as a test case, the authors give a proper treatment of the broadening including energy splitting and spontaneous emission effects. At low perturber densities (from 1010to 1014cm-3) the profile is calculated in the line centre within the impact approximation. Each collision is well described by a semiclassical perturbational approach. The energy separation of the sublevels for n=2 and n=3 produces a splitting of the line into seven components and modifies the collisional cross sections. These components, well resolved at perturber densities lower than 1012cm-3, are gradually mixed for increasing densities.Keywords
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