Scaled collision strengths for Delta N equal to or greater than 1 transitions involving N equal to or less than 5 in hydrogenic ions

Details Scaled collision strengths for Delta N equal to or greater than 1 transitions involving N equal to or less than 5 in hydrogenic ions Scaled collision strengths for Delta N equal to or greater than 1 transitions involving N equal to or less than 5 in hydrogenic ions

Aug 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apjs...49..545c&link_type=abstract

Astrophysical Journal Supplement Series, vol. 49, Aug. 1982, p. 545-554.

Astronomy and Astrophysics

Astrophysics

39

Collision Parameters, High Temperature Plasmas, Ionic Collisions, Transition Probabilities, Born-Oppenheimer Approximation, Hydrogen Ions, Perturbation Theory, Rarefied Plasmas, Scattering Cross Sections

Scientific paper

Collision strengths for excitation of highly charged ions by electron impact are needed in the study of high temperature, low density plasmas such as occur frequently in astrophysics and in magnetic fusion research. Golden and Sampson (1978) have performed calculations of the scaled collision strength for several transitions in hydrogenic ions for low impact electron energies (epsilon equal to or less than 4), where epsilon is the impact electron energy in threshold units. The Coulomb-Born-Oppenheimer method was used in the investigation. Golden et al. (1981) have used the same method to calculate values for the scaled collision strength for transitions of the type nl-n'l' with epsilon not exceeding 10. In the present investigation the scaled collision strengths for hydrogenic ions are calculated for epsilon equal to or less than 15 for the remaining transitions. The investigation makes use of a revised, more efficient version of the computer program employed by Golden et al.

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