Hydrogen fine-structure effects at low electron densities

Details Hydrogen fine-structure effects at low electron densities Hydrogen fine-structure effects at low electron densities

May 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978phrva..17.1686e&link_type=abstract

Physical Review A - General Physics, 3rd Series, vol. 17, May 1978, p. 1686-1689. Research supported by the Deutsche Forschungs

Physics

General Physics

12

Electron Density (Concentration), Fine Structure, Hydrogen Plasma, Plasma Spectra, H Alpha Line, Plasma Cylinders, Spectral Line Width, Stark Effect

Scientific paper

Measurements of the plasma-broadened H-alpha line shape in a wall-stabilized arc show considerable differences between experimental and theoretical line profiles at electron densities below 10 to the 16th power/cu cm. The half-width of the experimental profile is up to three times larger than predicted theoretically. At low electron densities (less than or about 10 to the 15th power/cu cm), part of such discrepancies can be attributed to the neglect of fine-structure splitting in current Stark-broadening calculations, especially for H-alpha, L-alpha, and hydrogenic-ion lines.

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