J/ApJS/167/292ivo://CDS.VizieR/J/ApJS/167/292doi:10.26093/cds/vizier.21670292CDSDen Hartog E.A.Lawler J.E.Sneden C.Cowan J.J.2017-06-20T13:16:45Z2008-08-06T21:40:01ZCDS support team

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

cds-question@unistra.fratomic-physicsRadiative lifetimes, accurate to +/-5%, have been measured for 49 even-parity and 14 odd-parity levels of GdII using laser-induced fluorescence. The lifetimes are combined with branching fractions measured using Fourier transform spectrometry to determine transition probabilities for 611 lines of Gd II. This work is the largest-scale laboratory study to date of GdII transition probabilities and the first using a high-performance Fourier transform spectrometer. This improved data set has been used to determine a new solar photospheric Gd abundance, log{epsilon}=1.11+/-0.03. Revised Gd abundances have also been derived for the r-process-rich metal-poor giant stars CS 22892-052, BD +17 3248, and HD 115444. The resulting Gd/Eu abundance ratios are in very good agreement with the solar system r-process ratio. We have employed the increasingly accurate stellar abundance determinations, resulting in large part from the more precise laboratory atomic data, to predict directly the solar system r-process elemental abundances for Gd, Sm, Ho, and Nd. Our analysis of the stellar data suggests slightly higher recommended values for the r-process contribution and total solar system values, consistent with the photospheric determinations, for the elements for Gd, Sm, and Ho.2006ApJS..167..292Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/167/292CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/167/292https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/167/292http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/167/292https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/167/292https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/167/292http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/167/292GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/ApJS/167/292/table3Atomic transition probabilities for Gd II organized by increasing wavelength in airJ1Upper level J valuephys.angMomentumfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in air in Angstroms0.1nmem.wldoubleE1Upper level energycm**-1phys.energy;phys.atmol.leveldoubleP1Upper level parity (ev or od)phys.atmol.parity;phys.atmol.levelcharE0Lower level energycm**-1phys.energy;phys.atmol.leveldoubleP0Lower level parity (ev or od)phys.atmol.parity;phys.atmol.levelcharJ0Lower level J valuephys.angMomentumfloatA(1-0)Transition probability1e+06s**-1phys.atmol.transProbfloate_TranPTotal uncertainty in TranP1e+06s**-1stat.errorfloatlog(gf)Log of the degeneracy times the oscillator strengthphys.atmol.oscStrengthfloat