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1、Mon.Not.R.Astron.Soc.396,21242132(2009)doi:10.1111/j.1365-2966.2009.14761.xExperimentalandtheoreticalradiativedecayratesforhighlyexcitedrutheniumatomiclevelsandthesolarabundanceofrutheniumV.Fivet,1P.Quinet,1,2P.Palmeri,1E.Bi´emont,´1,2M.Asplund,3N.Grevesse,4A.J.Sauval,5L.Eng
2、strom,¨6H.Lundberg,6H.Hartman7andH.Nilsson71AstrophysiqueetSpectroscopie,UniversitedeMons-Hainaut,B-7000Mons,Belgium´2IPNAS,UniversitedeLi´ege,B15SartTilman,B-4000Li`ege,Belgium`3MaxPlanckInstituteforAstrophysics,Postfach1317,D-85741Garching,Germany4CentreSpatialdeLiege,Avenu
3、ePr`eAily,B-4031Angleur-Li´egeandInstitutd’AstrophysiqueetdeG`eophysique,Universit´edeLi´ege,All`eedu6Ao´ut,17,ˆB5C,B-4000Liege,Belgium`5ObservatoireRoyaldeBelgique,AvenueCirculaire,3,B-1180Bruxelles,Belgium6DepartmentofPhysics,LundUniversity,POBox118,SE-22100Lund,Sweden7Lund
4、Observatory,LundUniversity,POBox43,SE-22100Lund,SwedenAccepted2009March9.Received2009February19ABSTRACTThesolarphotosphericabundanceofrutheniumisrevisedonthebasisofanewsetofoscillatorstrengthsderivedforRuItransitionswithwavelengthsinthespectralrange22504710Å.Thenewabundanceva
5、lue(intheusuallogarithmicscalewherethesolarhydrogenabundanceisequalto12.00),ARu=1.72±0.10,isinagreementwiththemostrecentmeteoriticresult,ARu=1.76±0.03.Theaccuracyofthetransitionprobabilities,obtainedusingarelativisticHartreeFockmodelincludingcore-polarizationeffects,hasbeenas
6、sessedbycomparingthetheoreticallifetimeswithpreviousexperimentalresults.Acomparisonisalsomadewithnewmeasurementsperformedinthisworkbythetime-resolvedlaser-inducedfluorescencespectroscopyfor10highlyexcitedodd-paritylevelsofRuI.Keywords:atomicdataatomicprocessesSun:abundances.fe
7、ws-processelementsareparticularlyinterestinginthatrespect1INTRODUCTIONbecausetheyprovideinformationonthetime-scalesinvolvedintheRutheniumisatransitionmetal(Z=44)ofthepalladiumgroupprocess.Rutheniumisamongtheseelements.havingsevenstableisotopes(A=96,98,99,100,101,102and104)The
8、rutheniumabundance,andalsothatofotherelementssuchasoccurringwiththen
