J/A+A/508/1527ivo://CDS.VizieR/J/A+A/508/1527doi:10.26093/cds/vizier.35081527CDSBautista M.A.Quinet P.Palmeri P.Badnell N.Dunn J.Arav N.2010-01-18T15:00:47Z2010-01-18T12:28:49ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.fratomic-physicsThis work reports on radiative transition rates and electron impact excitation collision strengths for levels of the 3s^2^3p, 3s3p^2^, 3s^2^4s, and 3s^2^3d configurations of Si II. The radiative data were computed using the Thomas-Fermi-Dirac-Amaldi central potential, but with the modifications introduced by Bautista (2008, J. Phys. B: Atom. Mol. Opt. Phys., 41, 065701) that account for the effects of electron-electron interactions. We also introduce new schemes for the optimization of the variational parameters of the potential. Additional calculations were carried out with the Relativistic Hartree-Fock and the multiconfiguration Dirac-Fock methods. Collision strengths in LS-coupling were calculated in the close coupling approximation with the R-matrix method. Then, fine structure collision strengths were obtained by means of the intermediate-coupling frame transformation (ICFT) method which accounts for spin-orbit coupling effects.2009A&A...508.1527Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/508/1527CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/508/1527https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/508/1527http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/508/1527https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/508/1527https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/508/1527http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/508/1527GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/508/1527/table7gf-values and radiative transition rates (A-values) for dipole allowed transitionsiIndex of lower levelmeta.idintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintjIndex of upper levelmeta.idintlambdaWavelength0.1nmem.wlfloatlog(gf)Oscillator strength value (in log_10_)phys.atmol.oscStrengthfloate_log(gf)rms uncertainty on log(gf)stat.errorfloatARadiative transition rates**-1phys.atmol.transProb;phys.atmol.transitiondoublee_Arms uncertainty on As**-1stat.errordoublelLevelLower levelphys.atmol.qnuLevelUpper levelphys.atmol.qnJ/A+A/508/1527/table8Maxwellian averaged collision strengthsjIndex of upper levelmeta.idintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintiIndex of lower levelmeta.idintECS1Effective collision strengths for T=5.0000E+03Kphys.atmol.collStrengthdoubleECS2Effective collision strengths for T=7.5000E+03Kphys.atmol.collStrengthdoubleECS3Effective collision strengths for T=1.0000E+04Kphys.atmol.collStrengthdoubleECS4Effective collision strengths for T=1.2500E+04Kphys.atmol.collStrengthdoubleECS5Effective collision strengths for T=1.5000E+04Kphys.atmol.collStrengthdoubleECS6Effective collision strengths for T=1.7500E+04Kphys.atmol.collStrengthdoubleECS7Effective collision strengths for T=2.0000E+04Kphys.atmol.collStrengthdouble