Electron impact excitation of NiII

DOI

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.

Identifier
DOI http://doi.org/10.26093/cds/vizier.34200763
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+A/420/763
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/420/763
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/420/763
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/A+A/420/763
Provenance
Creator Bautista M.A.
Publisher CDS
Publication Year 2004
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Interdisciplinary Astronomy; Natural Sciences; Physics