Effective collision strengths for fine-structure forbidden transitions in the 3p3 configuration of AR IV

Details Effective collision strengths for fine-structure forbidden transitions in the 3p3 configuration of AR IV Effective collision strengths for fine-structure forbidden transitions in the 3p3 configuration of AR IV

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...188..251z&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 188, no. 1, Dec. 1987, p. 251-257.

Astronomy and Astrophysics

Astrophysics

70

Argon, Collision Parameters, Fine Structure, Forbidden Transitions, Ground State, Planetary Nebulae

Scientific paper

Effective collision strengths for all the fine-structure forbidden transitions within the 3p3 ground configuration of Ar IV have been calculated in a 7-state close-coupling approximation including configuration interaction in the target representation. A comparison with data available in the literature shows that the refinements used in the present work result in important changes, which should considerably affect astrophysical diagnostics, for example in nebulae. This is illustrated with the case of the electron density-dependent line intensity ratio I(λ4741.5)/I(λ4712.7).

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