Collision strengths for optically allowed transitions in NE V and MG VII

Details Collision strengths for optically allowed transitions in NE V and MG VII Collision strengths for optically allowed transitions in NE V and MG VII

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apjs...58..289a&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 58, June 1985, p. 289-296. Research supported by the Science and

Statistics

Computation

15

Collision Parameters, Magnesium, Neon, Transition Probabilities, Configuration Interaction, Matrix Theory

Scientific paper

Collision strengths for the optically allowed transitions have been calculated among the 1s2 2s2 2p2, 1s2 2s 2p3, and 1s2 2p4 configurations of Ne V and Mg VII. The R-matrix and Coulomb-Born methods are used to calculate the contribution of partial waves with angular momentum L of at least 9 and L less than 9 respectively. The calculations are made for a wide energy range, up to 40 Ry for Ne V and up to 65 Ry for Mg VII. The present results are found to be lower, in general, by as much as 45 percent than the earlier distorted-wave calculations. Effective collision strengths (used in the computations of excitation and de-excitation rate coefficients) are also calculated for a wide electron temperature range of 5000-10,000,000 K and are compared with the earlier results.

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