J/A+A/457/721ivo://CDS.VizieR/J/A+A/457/721doi:10.26093/cds/vizier.34570721CDSNahar S.N.2023-04-24T14:32:49Z2008-12-31T17:09:48ZCDS support team

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

cds-question@unistra.fratomic-physicsAn extensive set of oscillator strengths (f), line strengths (S) and radiative decay rates (A) for the allowed and forbidden transitions in Fe XVIII is presented. The results include 1174 fine structure levels of total angular momenta J=1/2-17/2 of even and odd parities with 2<=n<=10, 0<=l<=9, orbital angular momenta, 0<=L<=11, and spin multiplicities 2, 4. These yield about 171500 transitions. The allowed electric dipole (E1) transitions, 141 869 in total, are obtained in the close coupling approximation using the relativistic Breit-Pauli R-matrix (BPRM) method. The forbidden electric quadrupole (E2), octupole (E3), and magnetic dipole (M1), quadrupole (M2) transitions, 29 682 in total, are obtained from configuration interaction Breit-Pauli atomic structure calculations using the code SUPERSTRUCTURE. The close coupling wavefunction expansion for Fe XVIII includes 10 levels of configurations 2s^2^ 2p^4^, 2s2p^5^, and 2p^6^ in the BRPM calculations. All fine structure levels have been identified spectroscopically. Erratum: A bug was detected and corrected in early 2007 in one of the stages called RECUPD (Storey, Berrington, Werner, 2007, private Iron Project communications) of the Breit-Pauli R-matrix (BPRM) codes of the Iron Project. It was related to the the phase factor of dipole matrix elements of the Iron Project (Berrington et al., 1995, Comput. Phys. Commun. 92, 290) and affected certain transition probabilities. The new results on energies and transition probabilities for Fe XX (Nahar, 2004, J/A+A/413/779) and Fe XVIII (Nahar, 2006, J/A+A/457/721, this paper) using the corrected code are replacing the earlier results at CDS. It should be noted that stage RECUPD in BPRM codes does not exist in the LS coupling R-matrix code from the Opacity Project (Berrington et al., 1987, J. Phys. B 20, 6379) and hence does not affect the non-relativistic results. Results for other ions, obtained using BPRM codes, did not indicate the bug effect when compared with existing results. However, I am repeating the calculations for these ions and will replace the earlier results. The E1 transition probabilities for Fe XX have been recomputed. The new files are: table3a, table3b -> fine structure energy levels of Fe XVIII table4a, table4b -> complete table of E1 fine structure transitions in Fe XVIII table5 -> table of fine structure transitions in Fe XVIII using observed energies In paper LIV (Fe XX), J/A+A/413/779, files were also corrected.2006A&A...457..721Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/457/721CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+AS/103/273 : IRON Project II IR collision strengths of C-like ionsJ/A+A/283/319 : IRON Project III B-like ionsJ/A+AS/108/1 : IRON Project V Collision strengths of O-like ionsJ/A+A/293/953 : IRON Project VI Fe II collision strengthsJ/A+A/293/967 : IRON Project VII Fe II radiative transitionsJ/A+AS/109/193 : IRON Project VIII Electron excitation of Ti-like ionsJ/A+AS/119/509 : IRON Project XVII Radiative transition in Fe IIIJ/A+AS/119/523 : IRON Project XVIII Electron impact for Fe IIIJ/A+AS/120/361 : IRON Project XIX Fe II radiative transitionsJ/A+AS/123/159 : IRON Project XXII C and O radiative ratesJ/A+AS/123/575 : IRON Project XXIII Fe XXII excitation rate coefficientsJ/A+AS/126/373 : IRON Project XXVII Fe IV collision strengthsJ/A+AS/131/499 : IRON Project XXIX Boron isoelectronic sequenceJ/A+AS/131/153 : IRON Project XXXI Fe XII electron excitationJ/A+AS/135/347 : IRON Project XXXV Fe XXIV & Fe XXV oscillator strengthsJ/A+AS/136/395 : IRON Project XXXVII Fe VI collision strengthsJ/A+AS/137/165 : IRON Project XXXVIII Fe XV fine-structure transitionsJ/A+AS/143/483 : IRON Project XLII Fe XXI electron impact excitationJ/A+AS/144/141 : IRON Project XLIII Fe V transition probabilitiesJ/A+AS/147/111 : IRON Project XLIV Fe VI trans. prob. & line ratioJ/A+AS/147/253 : IRON Project XLV Ar XIII, Fe XXI trans. probabilitiesJ/A+A/365/268 : IRON Project XLVII Ni III electron impact excitationJ/A+A/372/1078 : IRON Project XLIX Fe XX electron impact excitationJ/A+A/372/1083 : IRON Project L Fe XIX electron impact excitationJ/A+A/394/753 : IRON Project LI Fe IX electron impact excitationJ/A+A/408/789 : IRON Project LIII Fe XVII transition probabilitiesJ/A+A/413/779 : IRON Project LIV Fe XX transition probabilitiesJ/A+A/420/763 : IRON Project LV Ni II electron impact excitationJ/A+A/437/345 : IRON Project LIX Fe IV transition probabilitiesJ/A+A/448/779 : IRON Project LXI Fe IV radiative transitionsJ/A+A/466/763 : IRON Project LXIII Fe^19+^ electron impact excitationhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/457/721https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/457/721http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/457/721https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/457/721https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/457/721http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/457/721GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/457/721/levelsEnergy levels (tables 3b and 4a)confConfigurationphys.atmol.configurationcharLSLS term (2)phys.atmol.termcharjjpiiiiEnergy level ids (3)phys.energy;phys.atmol.levelintCtTarget configuration (2)phys.atmol.configurationcharSLpitTarget core levelphys.atmol.configurationcharJtTarget J value (2)phys.atmol.qncharnlPrincipal and orbital quantum numbers of the outer electronphys.atmol.configurationcharElevEnergy of the levelRyphys.energy;phys.atmol.leveldoubleEQN? Effective Quantum Number (3)phys.atmol.qnfloatnullableTermsPossible LS terms of the energy levelphys.energy;phys.atmol.levelcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordinti[1,1174] Level indexmeta.idintJJ valuephys.atmol.qnfloatp[eo] Parity (o: odd, e: even)phys.atmol.paritychariiiLevel position index within J+pmeta.idintEobsEnergy (1)Ryphys.energy;phys.atmol.leveldoubleJ/A+A/457/721/setSet of initial and final g, P and N values for table4b.datNfFinal Nlv valuemeta.numberintSetSet numbermeta.id;meta.mainintprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintgiInitial statistical weight factorphys.atmol.oscStrengthintPi[0/1] Initial parity valuephys.atmol.parityintgfFinal statistical weight factorphys.atmol.oscStrengthintPf[0/1] Final parity valuephys.atmol.parityintNiInitial Nlv valuemeta.numberintNNTotal number of transitions in the setmeta.numberintJ/A+A/457/721/table4bf-, S and A-values for allowed E1 transitions in Fe XVIII.iInitial level (index in set)meta.codeintjFinal level (index in set)meta.codeintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSetSet, as defined in set.dat filemeta.noteintwlWavelength of the transition0.1nmem.wl;phys.atmol.transitiondoubleindexedEiInitial energyRyphys.energy;phys.atmol.leveldoubleEjFinal energyRyphys.energy;phys.atmol.leveldoublefLfL valuephys.atmol.oscStrengthdoubleSLine strengthspect.line.intensitydoubleAjiEinstein Aji coefficients**-1phys.atmol.transProbdoubleJ/A+A/457/721/table5*Oscillator strengths f, S, A-values for allowed E1 fine structure transitions with the observed energy levels onlyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCiInitial configurationmeta.idcharCjFinal configurationmeta.idcharslpiInitial core level (G1) (G2)phys.atmol.configurationcharslpjFinal core level (G1) (G2)phys.atmol.configurationchargiInitial statistical weight factorstat.weightintIi? Energy level index of 2Ji+1 (no value when Ci = LS)stat.fit.paramintnullablegjFinal statistical weight factorstat.weight;phys.atmol.finalintIj? Energy level index of 2Jj+1 (no value when Ci = LS)stat.fit.paramintnullableEij? Transition energy0.1nmphys.energy;phys.atmol.transitionfloatnullablefOscillator strength (f value)phys.atmol.oscStrengthdoubleSLine strengthspect.line.intensitydoubleARadiative decay rate (A value)s**-1phys.atmol.transProbdoubleJ/A+A/457/721/table7*Fine structure levels of Fe XVIII and their relative energies for which forbidden transitions have been obtained.recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintieFine structure energy levelmeta.idintSLp(Cf)Theoretical LS symmetry of the level and the configuration number (G1)phys.atmol.configurationchar2JTheoretical 2J valuephys.atmol.qnintk*cmTheoretical k*cm valuephys.atmol.transitiondoubleEthTheoretical energyRyphys.energydoubleConfConfigurationphys.atmol.configuration;instr.setupcharSLPExpected SLP valuephys.atmol.configurationintEExpected energy (actual set to use)Ryphys.energydoubledf%df valuestat.fit.paramfloatJ/A+A/457/721/table8a*Forbidden octupole E3 and quadrupole M2 transitions in Breit-Pauli approximationSM2M2 line strength (G3)spect.line.intensitydoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNiInitial numbermeta.idintNjFinal numbermeta.idintSLpi(Ci)Initial core level (G1) (G2)phys.atmol.configurationcharSLpj(Cj)Final core level (G1) (G2)phys.atmol.configurationchargiInitial statistical weight factorphys.atmol.oscStrengthintgjFinal statistical weight factorphys.atmol.oscStrengthintwlWavelength in vacuum0.1nmem.wl;phys.atmol.transitiondoubleEiInitial energyRyphys.energy;phys.atmol.leveldoubleEjFinal energyRyphys.energy;phys.atmol.leveldoubleSE3E3 line strength (G3)spect.line.intensitydoubleAE3Forbidden E3 transition probabilitys**-1phys.atmol.transProbdoubleAM2Forbidden M2 transition probabilitys**-1phys.atmol.transProbdoubleJ/A+A/457/721/table8b*Forbidden quadrupole E2 and dipole M1 transitions in Breit-Pauli approximationNiInitial numbermeta.idintNjFinal numbermeta.idintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSLpi(Ci)Initial core level (G1) (G2)phys.atmol.configurationcharSLpj(Cj)Final core level (G1) (G2)phys.atmol.configurationchargiInitial statistical weight factorphys.atmol.oscStrengthintgjFinal statistical weight factorphys.atmol.oscStrengthintwlWavelength in vacuum0.1nmem.wl;phys.atmol.transitiondoubleEiInitial energyRyphys.energy;phys.atmol.leveldoubleEjFinal energyRyphys.energy;phys.atmol.leveldoubleSE2E2 line strength (G3)spect.line.intensitydoubleAE2Forbidden E2 transition probabilitys**-1phys.atmol.transProbdoubleSM1M1 line strength (G3)spect.line.intensitydoubleAM1Forbidden M1 transition probabilitys**-1phys.atmol.transProbdouble