Electron impact excitation of NiII (Bautista+, 2004)

Details Electron impact excitation of NiII (Bautista+, 2004) Electron impact excitation of NiII (Bautista+, 2004)

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004ycat..34200763b&link_type=abstract

VizieR On-line Data Catalog: J/A+A/420/763. Originally published in: 2004A&A...420..763B

Physics

Atomic Physics

Atomic Physics

Scientific paper

We study the effects of using a 4d{bar} pseudo-orbital on the collision strengths for electron impact excitations of forbidden transitions in Ni II computed in the close coupling approximation. It is found that the resonance structures of the collision strengths are quite sensitive to the way the pseudo-orbital is created. Further, the close coupling expansion with a single 4d{bar} orbital does not converge, resulting in a poor representation of (N+1)-electrons auto-ionizing states. Much greater expansions are needed to properly represent resonance structures in electron impact excitation calculations, resulting in variations of up to factors of two, with respect to previous computations, in the Maxwellian averaged excitation rate coefficients.
(2 data files).

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