Atomic data from the IRON Project. XXXIV. Electron impact excitation of Fe XVI

Details Atomic data from the IRON Project. XXXIV. Electron impact excitation of Fe XVI Atomic data from the IRON Project. XXXIV. Electron impact excitation of Fe XVI

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26as..136..385e&link_type=abstract

Astronomy and Astrophysics Supplement, v.136, p.385-394

Astronomy and Astrophysics

Astrophysics

16

Atomic And Molecular Data, Sun: Corona

Scientific paper

As part of the IRON Project, electron impact excitation effective collision strengths are computed for the ion Fe xvi familiar in solar spectra. A Breit-Pauli R-matrix calculation is performed with a 12-level (n<= 4) target representation. The calculation for this relatively simple ion is approached as a test case where we can analyze in detail most of the effects that contribute to the accuracy of the collision strengths: the energy mesh, relativistic corrections, the asymptotic multipole potentials and contributions from high partial waves. By comparing with two recent independent calculations, an accuracy rating of 10% is assigned to the present effective collision strengths in the electron-temperature range of 10(5<=) T/{K}<= 10(7) .

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