Scaled Coulomb-Born-Oppenheimer collision strengths for hydrogenic ions in the limit Z = infinity

Details Scaled Coulomb-Born-Oppenheimer collision strengths for hydrogenic ions in the limit Z = infinity Scaled Coulomb-Born-Oppenheimer collision strengths for hydrogenic ions in the limit Z = infinity

Publishing date

Sep 1978

URL

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apjs...38...19g&link_type=abstract

Journals

Astrophysical Journal Supplement Series, vol. 38, Sept. 1978, p. 19-28.

Science

Astronomy and Astrophysics

Field

Astrophysics

Additional info 2

17

Additional info 3

Born Approximation, Collisional Plasmas, Coulomb Collisions, Electron Transitions, High Temperature Plasmas, Transition Probabilities, Cosmic Plasma, Energy Levels, Tables (Data)

Type

Scientific paper

Abstract

Coulomb-Born-Oppenheimer calculations of the two scaled collision strengths for hydrogenic ions with Z = infinity are performed. Results of the calculations at six impact electron energies are presented for each of the transitions 1s - ns, np, nd; 2s - ns, np, nd; and 2p - ns, np, nd (where n = 3, 4, and 5) as well as for the 1s - 2s and 1s - 2p transitions. Formulas are summarized for obtaining approximate results for a very large number of transitions in highly charged complex ions from the results given for the two scaled collision strengths. Numerical values for these scaled collision strengths are reported and fitted to simple analytic expressions that are readily integrated over a Maxwellian electron velocity distribution to obtain the corresponding collision rates.

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