J/A+A/500/1253ivo://CDS.VizieR/J/A+A/500/1253doi:10.26093/cds/vizier.35001253CDSMunoz Burgos J.M.Loch S.D.Ballance C.P.Boivin R.F.2009-09-27T09:37:28Z2009-09-27T09:29:37ZCDS support team

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

cds-question@unistra.fratomic-physicsEmission from Ar III is seen in planetary nebulae, in H II regions, and from laboratory plasmas. The analysis of such spectra requires accurate electron impact excitation data. The aim of this work is to improve the electron impact excitation data available for Ar^2+^, for application in studies of planetary nebulae and laboratory plasma spectra. The effects of the new data on diagnostic line ratios are also studied. Electron-impact excitation collision strengths have been calculated using the R-Matrix Intermediate-Coupling Frame-Transformation method and the R-Matrix Breit-Pauli method. Excitation cross sections are calculated between all levels of the configurations 3s^2^3p^4^, 3s3p^5^, 3p^6^, 3p^5^3d, and 3s^2^3p^3^nl (3d<=nl<=5s). Maxwellian effective collision strengths are generated from the collision strength data.2009A&A...500.1253Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/500/1253CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+AS/147/253 : IRON Project. XLV. Ar XIII and Fe XXI (Nahar, 2000)J/A+AS/147/253 : IRON Project. XLV. Ar XIII and Fe XXI (Nahar, 2000)J/A+A/436/1141 : Radiative rates in Ar XIII, Ar XIV + Ar XV (Aggarwal+, 2005)J/A+A/441/831 : Electron impact excitation of Ar XVII (Aggarwal+, 2005)J/A+A/487/383 : Ar XVIII radiative and excitation rates (Aggarwal+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/500/1253https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/500/1253http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/500/1253https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/500/1253https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/500/1253http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/500/1253GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/500/1253/ecolEffective collision strengths for transitions between the 3s^2^3p^4^ levelsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTTemperatureKphys.temperatureintESC1^3^P_1_-^3^P_2_ level effective collision strengthphys.atmol.collStrengthfloatESC2^3^P_0_-^3^P_2_ level effective collision strengthphys.atmol.collStrengthfloatESC3^1^D_2_-^3^P_2_ level effective collision strengthphys.atmol.collStrengthfloatESC4^1^S_0_-^3^P_2_ level effective collision strengthphys.atmol.collStrengthfloatESC5^3^P_0_-^3^P_1_ level effective collision strengthphys.atmol.collStrengthfloatESC6^1^D_2_-^3^P_1_ level effective collision strengthphys.atmol.collStrengthfloatESC7^1^S_0_-^3^P_1_ level effective collision strengthphys.atmol.collStrengthfloatESC8^1^D_2_-^3^P_0_ level effective collision strengthphys.atmol.collStrengthfloatESC9^1^S_0_-^3^P_0_ level effective collision strengthphys.atmol.collStrengthfloatESC10^1^S_0_-^1^D_2_ level effective collision strengthphys.atmol.collStrengthfloatJ/A+A/500/1253/energyResults for the first 29 levelsLevel^2S+1^L_J_ termphys.atmol.qncharENISTNIST energyRyfloatEPresent energyRyphys.energyfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintConfConfigurationphys.atmol.configuration;instr.setupe_Erms uncertainty on E%stat.errorfloatJ/A+A/500/1253/avaluesComparisons of selected radiative rates for transitions in Ar^2+^recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintiConfConfiguration (initial)phys.atmol.configuration;instr.setupfConfConfiguration (final)phys.atmol.configuration;instr.setupiLevelLevel (initial)meta.id;phys.atmol.levelfLevelLevel (final)meta.id;phys.atmol.levelAjkNISTNIST radiative rate, Ajks**-1phys.atmol.transProbdoubleAjk? Present radiative rate, Ajks**-1phys.atmol.transProbdoublenullableAjkMMendoza & Zeippen (1983MNRAS.202..981M) radiative rate, Ajks**-1phys.atmol.transProbdouble