Coronal Mg(9+) - Collisional excitation of the 2s-2p multiplet

Details Coronal Mg(9+) - Collisional excitation of the 2s-2p multiplet Coronal Mg(9+) - Collisional excitation of the 2s-2p multiplet

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...217..319b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 217, no. 1-2, June 1989, p. 319-328. Research supported by SERC.

Astronomy and Astrophysics

Astrophysics

26

Coulomb Collisions, Fine Structure, Magnesium, Positive Ions, Solar Atmosphere, Atomic Energy Levels, Electron Impact, Oscillator Strengths, Solar Corona, Wave Functions

Scientific paper

Electron impact excitation of the astrophysically important 2s-2p multiplet in lithium-like Mg(9+) is discussed. The collision strength for this optically allowed transition is computed using a two state model ion with the close coupling approximation. At high impact energies a distorted wave approximation is used. The contribution from distant encounters is determined by the Coulomb Bethe approximation. The Burgess-Tully method is used to interpolate the results and to evaluate the thermally averaged collision strength from which the rate coefficient is readily obtained.

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