Abstract
A precision comparison is made between the Stark-broadened profiles of ${\mathrm{H}}_{\ensuremath{\beta}}$, ${\mathrm{H}}_{\ensuremath{\gamma}}$, and ${\mathrm{H}}_{\ensuremath{\delta}}$ measured by Hill and Gerardo and the theoretical profiles calculated by Kepple and Griem. In addition, the effects of inelastic collisions between perturbing electrons and the radiating atom are investigated. It is found that the inclusion of the inelastic collisions improves the qualitative agreement between theory and experiment near the line center, but that the Gaunt factors used to estimate the broadening strength of the inelastic collisions overestimate the effect. In terms of half-widths, the best comparison to experiment was obtained using theoretical profiles which omitted inelastic collisions. The electron densities determined from these profiles are 2, 3, and 6% less than the interferometeric values for ${\mathrm{H}}_{\ensuremath{\beta}}$, ${\mathrm{H}}_{\ensuremath{\gamma}}$, and ${\mathrm{H}}_{\ensuremath{\delta}}$, respectively.
Published Version
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