Physics – General Physics
Scientific paper
Jan 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980phrva..21..319e&link_type=abstract
Physical Review A - General Physics, 3rd Series, vol. 21, Jan. 1980, p. 319-334.
Physics
General Physics
20
Balmer Series, Electron Density (Concentration), H Lines, Plasma Diagnostics, Plasma Spectra, Spectral Line Width, Electron Energy, Gas Temperature, Ion Motion, Line Shape, Magnetohydrodynamic Stability, Spectrum Analysis, Temperature Dependence
Scientific paper
The paper reports on the measuring of the central regions of plasma broadened Balmer lines H-alpha, H-beta, and H-gamma, in a wall stabilized arc over an electron density range between approximately 4 x 10 to the 14th and 2 x 10 to the 16th per cu cm. It is shown that the experimental profiles exhibit much less structure in the line core than predicted by theories based on the static-ion approximations. These discrepancies increase toward lower electron densities and lower Balmer-series members. It is found that the central minimum of H-beta depends on the reduced mass of the radiator ion perturber system, which is consistent with earlier experiments. It is also reported that the theoretically predicted 'shoulder' in the H-gamma line shape is nearly absent in the experimental profile.
Ehrich H.
Kelleher Daniel E.
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