J/A+A/643/A156ivo://CDS.VizieR/J/A+A/643/A156doi:10.26093/cds/vizier.36430156CDSLi W.Hartman H.Wang K.Jonsson P.2022-05-05T12:02:40Z2020-11-19T07:26:35ZCDS support team

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

cds-question@unistra.fratomic-physicsAccurate atomic data for TiII are essential for abundance analyses in astronomical objects. The aim of this work is to provide accurate and extensive results of oscillator strengths and lifetimes for TiII. The multiconfiguration Dirac-Hartree-Fock (MCDHF) and relativistic configuration interaction (RCI) methods, which are implemented in the general-purpose relativistic atomic structure package GRASP2018, were used in the present work. In the final RCI calculations, the transverse-photon (Breit) interaction, the vacuum polarization, and the self-energy corrections were included. Energy levels and transition data were calculated for the 99 lowest states in TiII. Calculated excitation energies are found to be in good agreement with experimental data from the Atomic Spectra Database (ASD) of the National Institute of Standards and Technology (NIST) based on the study by Huldt et al. (Physica Scripta 25, 401 (1982)). Lifetimes and transition data, e.g. line strengths, weighted oscillator strengths, and transition probabilities for radiative electric dipole (E1),magnetic dipole (M1), and electric quadrupole (E2) transitions are given and extensively compared with results from previous calculations and measurements, when available. The present theoretical results of the oscillator strengths are in overall better agreement with values from the experiments than the other theoretical predictions. The computed lifetimes of the odd states are in excellent agreement with the measured lifetimes. Finally, we suggest a relabelling of the 3d^2^(^1^_2_D)4p y^2^D_3/2_^o^ and z^2^P_3/2_^o^ levels.2020A&A...643A.156Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/643/A156CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/643/A156https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/643/A156http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/643/A156https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/643/A156https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/643/A156http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/643/A156GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/643/A156/table3Transition data of E1, M1, E2 transitions for TiIIrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintUpperUpper levelphys.energy;phys.atmol.levelLowerLower levelphys.energy;phys.atmol.levelEMType of transitionmeta.codechardeltaETransition energy (1)cm**-1phys.energy;phys.atmol.transitionintlambdaWavelength of transition (1)0.1nmem.wl;phys.atmol.transitiondoubleSLine strength (in au) in the length gauge (for E1 and E2)spect.line.intensitydoublelog(gf)Weighted oscillator strength in the length gauge (for E1 and E2)phys.atmol.oscStrengthfloatARadiative transition probability in the length gauge (for E1 and E2)s**-1phys.atmol.transProbdouble