J/A+A/682/A184ivo://CDS.VizieR/J/A+A/682/A184doi:10.26093/cds/vizier.36820184CDSPehlivan Rhodin A.Hartman H.Nilsson H.Jonsson P.2024-11-28T20:06:29Z2024-02-27T07:59:43ZCDS support team

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

cds-question@unistra.fratomic-physicsIn this work, we analyse spectra of neutral silicon from laboratory measurements and perform atomic structure calculations both for neutral and singly ionised silicon. We report accurate oscillator strengths of SiI and SiII lines, including lines from highly excited levels. We have performed large scale atomic structure calculations with the relativistic multiconfiguration Dirac-Hartree-Fock method using the GRASP2K package to determine log gf values of SiI and SiII lines, taking into account valence-valence and core-valence electron correlation. In addition, we have derived oscillator strengths of SiI lines by combining the experimental branching fractions with radiative lifetimes from our calculations. The silicon plasma has been obtained from a hollow cathode discharge lamp and the intensity-calibrated high-resolution spectra have been recorded by a Fourier transform spectrometer. We provide an extensive set of accurate experimental and theoretical loggf values. 17 loggf values of SiI lines in the infrared were derived for the first time from experimental measurements. The experimental uncertainties of f-values vary between 5% for the strong lines and 25% for the weak lines. The theoretical values agree very well with the experimental values of this study and complete the missing transitions involving levels up to 3s^2^ 3p7s of SiI. In addition, we provide accurate calculated loggf values of SiII lines from the levels up to 3s^2^ 7f.2024A&A...682A.184Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/682/A184CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/682/A184https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/682/A184http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/682/A184https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/682/A184https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/682/A184http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/682/A184GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/682/A184/tableb1SiI energy levelsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLevelEnergy level configurationphys.energyEnergyEnergy from this workcm**-1phys.energy;phys.atmol.levelintEnergy2? Energy from W16 (1)cm**-1phys.energy;phys.atmol.leveldoublenullableEnergy3? Energy from CFF06 (2)cm**-1phys.energy;phys.atmol.levelintnullableEnergy4? Energy from S15 (3)cm**-1phys.energy;phys.atmol.levelintnullableEnergy5Energy from M&Z83 (4)cm**-1phys.energy;phys.atmol.leveldoubleJ/A+A/682/A184/tableb2Radiative lifetimes of SiI levelsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLevelEnergy level designationmeta.id;phys.energy;phys.atmol.levelEnergyEnergy from M&Z83 (1)cm**-1phys.energydoubleLifetimeRadiative lifetime from this work (2)nstime.lifetimedoubleLifetime2? Radiative lifetime from CFF05 (3)nstime.lifetimedoublenullableLifetime3? Radiative lifetime from OL91 (4)nstime.lifetimefloatnullablee_Lifetime3? Radiative lifetime error from OL91 (4)nsstat.errorfloatnullableJ/A+A/682/A184/tableb3log(gf) values for SiILLevelLower Energy level designationphys.mol.qnlambdaTransition wavelength (1)nmem.wl;phys.atmol.transitiondoubleWavenumberTransition wavenumber (1)cm**-1em.wavenumber;phys.atmol.transitiondoubleBFBranching fractionphys.atmol.branchingRatiofloate_BFBranching fraction uncertainty%stat.errorintAulTransition probabilitys**-1phys.atmol.transProbdoubleloggfExpExperimental oscillator strengthsphys.atmol.oscStrengthfloate_loggfExpExperimental oscillator strengths errorstat.errorfloatloggfCalCalculated oscillator strengthsphys.atmol.oscStrength;meta.modelledfloate_loggfCalCalculated oscillator strengths errorstat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintULevelUpper Energy level designationphys.mol.qnJ/A+A/682/A184/tableb4Radiative transition data of SiIrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintULevelUpper Energy level designationphys.mol.qnLLevelLower Energy level designationphys.mol.qnWavenumberTransition wavenumber (1)cm**-1em.wavenumber;phys.atmol.transitiondoublelambdaTransition vacuum wavelength (1)nmem.wl;phys.atmol.transitiondoublen_lambda[*] * for wavelength from Ritz numbers (2)meta.notecharATransition probabilitys**-1phys.atmol.transProbdoublegfCalculated weighted oscillator strengthphys.atmol.oscStrengthdoubleArescRescaled transition probabilitys**-1phys.atmol.transProbdoublegfrescRescaled calculated weighted oscillator strengthphys.atmol.oscStrength;meta.modelleddoublefuncertUncertainty oscillator strengths (G1)stat.errorfloatJ/A+A/682/A184/tableb5SiII energy levelsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLevelEnergy level configurationphys.energyEnergyEnergy from this workcm**-1phys.energy;phys.atmol.levelintEnergy2? Energy from CFF06 (1)cm**-1phys.energy;phys.atmol.levelintnullableEnergy3? Energy from A&K14 (2)cm**-1phys.energy;phys.atmol.levelintnullableEnergy4Energy from M&Z83 (3)cm**-1phys.energy;phys.atmol.leveldoubleJ/A+A/682/A184/tableb6Radiative lifetimes of SiII levelstau3? Radiative lifetime from experimentsnstime.lifetimedoublenullablee_tau3? Radiative lifetime error from experimentsnsstat.errorfloatnullabler_tau3[cde] Reference for Lifetime3 (4)meta.ref;pos.framecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLevelEnergy level designationmeta.id;phys.energy;phys.atmol.levelEnergyEnergy from M&Z83 (1)cm**-1phys.energydoubletauRadiative lifetime from this work (2)nstime.lifetimedoubletau2? Radiative lifetime from CFF06 (3)nstime.lifetimedoublenullableJ/A+A/682/A184/tableb7SiII A-valuesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintULevelUpper Energy level designationphys.mol.qnUEnergyEnergy upper levelcm**-1phys.energy;phys.atmol.leveldoubleLLevelLower Energy level designationphys.mol.qnLEnergyEnergy lower levelcm**-1phys.energy;phys.atmol.levelfloatlambdaTransition vacuum wavelength (1)nmem.wl;phys.atmol.transitionfloatATransition probability, this calculations**-1phys.atmol.transProbdoubleAexp? Transition probability, exp C93 (2)s**-1phys.atmol.transProbintnullablee_Aexp? Transition probability error, exp C93 (2)s**-1stat.errorintnullableAtheo1Transition probability, calc N98 (3)s**-1phys.atmol.transProbdoubleAtheo2Transition probability, calc AK14 (4)s**-1phys.atmol.transProbdoubleJ/A+A/682/A184/tableb8Radiative transition data of SiIIgfrescRescaled calculated weighted oscillator strengthsmeta.notedoublefuncertUncertainty oscillator strengths (G1)stat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintULevelUpper Energy level designationphys.mol.qnLLevelLower Energy level designationphys.mol.qnWavenumberTransition wavenumber (1)cm**-1em.wavenumber;phys.atmol.transitiondoublelambdaTransition vacuum wavelength (1)nmem.wl;phys.atmol.transitiondoublen_lambda[*] * for wavelength from Ritz numbers (2)meta.notecharATransition probabilitys**-1phys.atmol.transProbdoublegfCalculated weighted oscillator strengthsphys.atmol.oscStrengthdoubleArescRescaled transition probabilitys**-1phys.atmol.transProbdouble