Intermediate coupling collision strengths for delta N = 0 transitions produced by electron impact on highly charged ions. I - Theoretical development and application to N = 2 levels in helium-like ions

Details Intermediate coupling collision strengths for delta N = 0 transitions produced by electron impact on highly charged ions. I - Theoretical development and application to N = 2 levels in helium-like ions Intermediate coupling collision strengths for delta N = 0 transitions produced by electron impact on highly charged ions. I - Theoretical development and application to N = 2 levels in helium-like ions

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apjs...44..169s&link_type=abstract

Astrophysical Journal Supplement Series, vol. 44, Oct. 1980, p. 169-191.

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13

Electron Impact, Electron Transitions, Fine Structure, Helium Ions, Ionic Collisions, Transition Probabilities, Astronomical Models, Atomic Energy Levels, Controlled Fusion, Electric Dipoles, Spectral Energy Distribution

Scientific paper

A Coulomb-Born exchange method previously developed has been extended to transitions involving no change in principal quantum number n with intermediate coupling and configuration mixing effects included. The theory is used to calculate the collision and electric dipole line strengths for all fine-structure transitions with delta n = 0 and n = 2 in helium-like ions with nuclear charge number Z in the range between 6 and 74. This covers the entire range of Z of interest for astrophysical and controlled nuclear fusion applications; procedures are given for obtaining fits to the collision strength data using a simple form that is readily integrated over a Maxwellian energy distribution function to obtain collision rates.

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