Stark broadening of SI II and SI III spectral lines

Details Stark broadening of SI II and SI III spectral lines Stark broadening of SI II and SI III spectral lines

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...127...68d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 127, no. 1, Oct. 1983, p. 68-72.

Astronomy and Astrophysics

Astrophysics

13

Plasma Spectra, Silicon, Space Plasmas, Spectral Line Width, Stark Effect, Atomic Spectra, Fine Structure, Ions, Stellar Atmospheres

Scientific paper

Modified semiempirical and approximative semiclassical calculations of Stark widths for Si II and Si III lines are performed in order to test both methods by comparing the results with recently measured Stark widths. It is concluded that both methods can be used to estimate the Stark widths in the case of transitions between configurations with the core S(1). For transitions between configurations with the core P(3), a factor of two difference exists between approximate semiclassical and modified semiempirical results, indicating that the semiempirical Gaunt factors are too small in this case to compensate for the strong collision and higher order multiple interaction yield to the width. Other contributing factors to the disagreement are strong configuration interaction effects and autoionization effects.

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