J/A+A/620/A188ivo://CDS.VizieR/J/A+A/620/A188doi:10.26093/cds/vizier.36200188CDSJonauka V.2019-01-08T14:56:59Z2018-12-14T09:44:56ZCDS support team

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

cds-question@unistra.fratomic-physicsElectron-impact single- and double-ionization cross sections and Maxwellian rate coefficients are presented for the carbon atom. Scaling factors are introduced for the electron-impact excitation and ionization cross sections obtained in the distorted wave (DW) approximation. It is shown that the scaled DW cross sections provide good agreement with measurements for the single ionization of the C atom and C1+ ion. The direct double-ionization (DDI) process is studied using a multi-step approach. Ionization-ionization, excitation-ionization-ionization, and ionization-excitation-ionization branches are analyzed. It is demonstrated that the three-step processes contribute 40% of the total DDI cross sections for the case where one of the electrons takes all of the excess energy after the first ionization process.2018A&A...620A.188Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/620/A188CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/620/A188https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/620/A188http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/620/A188https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/620/A188https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/620/A188http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/620/A188GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/620/A188/table2Electron-impact ionization cross sections for the 1D2 level of carbonrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEEnergyeVphys.energy;phys.atmol.levelintCI:2sCI:2s cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleCI:2pCI:2p cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleEAEa cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleTotalTotal cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleJ/A+A/620/A188/table1Electron-impact ionization cross sections for the ground level of carbonrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEEnergyeVphys.energy;phys.atmol.levelintCI:2sCI:2s cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleCI:2pCI:2p cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleEAEa cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleTotalTotal cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleJ/A+A/620/A188/table9Maxwellian rate coefficients for the ground level of the C1+ ionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTeTemperatureKphys.temperature.electron;phys.electronfloatCI:2sCI:2s Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleCI:2pCI:2p Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleEAEa Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleTotalTotal Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleJ/A+A/620/A188/table10Maxwellian rate coefficients for the ground level of the C1+ ionTeTemperatureKphys.temperature.electron;phys.electronfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCI:2sCI:2s Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleCI:2pCI:2p Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleEAEa Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleTotalTotal Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleJ/A+A/620/A188/table11Maxwellian rate coefficients for the ground level of the carbon atom for the case when one of the electrons takes all excess energyTeTemperatureKphys.temperature.electron;phys.electronfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCI:2sCI:2s Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleCI:2pCI:2p Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleEAEa Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleTotalTotal Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleJ/A+A/620/A188/table12Maxwellian rate coefficients for the ground level of carbon atom when the electrons share excess energy equallyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTeTemperatureKphys.temperature.electron;phys.electronfloatCI:2sCI:2s Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleCI:2pCI:2p Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleEAEa Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleTotalTotal Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleJ/A+A/620/A188/table3Electron-impact ionization cross sections for the 1S0 level of carbonrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEEnergyeVphys.energy;phys.atmol.levelintCI:2sCI:2s cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleCI:2pCI:2p cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleEAEa cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleTotalTotal cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleJ/A+A/620/A188/table4Electron-impact ionization cross sections for the ground level of the C1+ ionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEEnergyeVphys.energy;phys.atmol.levelintCI:2sCI:2s cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleCI:2pCI:2p cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleEAEa cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleTotalTotal cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleJ/A+A/620/A188/table5Electron-impact double-ionization cross sections for the ground level of the carbon atom when one of the electrons takes all excess energyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEEnergyeVphys.energy;phys.atmol.levelintCI:2sCI:2s cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleCI:2pCI:2p cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleEAEa cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleTotalTotal cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleJ/A+A/620/A188/table6Electron-impact double-ionization cross sections for the ground level of the carbon atom when the electrons share equally excess energyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEEnergyeVphys.energy;phys.atmol.levelintCI:2sCI:2s cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleCI:2pCI:2p cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleEAEa cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleTotalTotal cross section1e-20cm**2meta.id.cross;phys.atmol.crossSectiondoubleJ/A+A/620/A188/table7Maxwellian rate coefficients for the ground level of carbonrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTeTemperatureKphys.temperature.electron;phys.electronfloatCI:2sCI:2s Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleCI:2pCI:2p Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleEAEa Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleTotalTotal Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleJ/A+A/620/A188/table8Maxwellian rate coefficients for the 1D2 level of carbonrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTeTemperatureKphys.temperature.electron;phys.electronfloatCI:2sCI:2s Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleCI:2pCI:2p Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleEAEa Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldoubleTotalTotal Maxwellian rate coefficient1e-10cm**3.s**-1arith.rate;phys.atmol.collisionaldouble