J/A+A/566/A123ivo://CDS.VizieR/J/A+A/566/A123doi:10.26093/cds/vizier.35660123CDSDel Zanna G.Storey P.J.BadnellN.R.2014-12-21T17:36:44Z2014-06-23T11:58:31ZCDS support team

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

cds-question@unistra.fratomic-physicsWe present a new large-scale R-matrix scattering calculation for electron collisional excitation of Ni XI, carried out with the intermediate-coupling frame transformation method (ICFT). The target includes all the main configurations up to n=4, and is a significant improvement over earlier R-matrix (only three n=3 configurations) and distorted-wave (DW) calculations. We find significant enhancements in the collision strengths of many of the strong transitions to the n=3,4 levels. They are due to the resonances that arise within the present large-scale target. This results in significant increases in the predicted intensities of the UV and visible forbidden lines within the 3s^2^ 3p^5^ 3d configuration, the strong EUV lines that result from the decays of the 3s^2^ 3p^5^ 3d levels to the ground state, and the decays from the n=4 levels, which are visible in the soft X-rays. We find good agreement between predicted and observed line intensities in the EUV. With the present atomic data, lines from Ni XI can reliably be used for plasma diagnostics. We also revise some level energies and suggest a few new possible identifications.2014A&A...566A.123Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/566/A123CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+AS/119/99 : [NiI] + [NiII] transition probabilities (Quinet+, 1996)J/A+A/365/268 : IRON Project. XLVII. Ni III (Bautista, 2001)J/A+A/460/959 : Ni XIX radiative and excitation rates (Aggarwal+, 2006)J/A+A/475/393 : NiXI radiative and excitation rates (Aggarwal+, 2007)J/A+A/488/365 : NiXIX effective collision strengths (Aggarwal+, 2008)J/A+A/488/1155 : Ni XXV energy levels and radiative rates (Duan+, 2008)J/A+A/513/A55 : Effective collision strengths of Ni II (Cassidy+, 2010)J/A+A/537/A12 : Effective collision strength of Ni XVII (Hudson+, 2012)J/A+A/541/A90 : FeX soft X-ray lines (Del Zanna+, 2012)J/A+A/543/A139 : FeXII soft X-ray lines (Del Zanna+, 2012)J/A+A/543/A144 : FeXIII soft X-ray lines (Del Zanna+, 2012)J/A+A/549/A42 : FeXI soft X-ray lines (Del Zanna+, 2013)J/A+A/565/A77 : Atomic data for FeIX (Del Zanna+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/566/A123https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/566/A123http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/566/A123https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/566/A123https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/566/A123http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/566/A123GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/566/A123/table1Level energies of the RM4 calculationL[0-7] L valuephys.atmol.qncharIndex[1/599] Level indexmeta.idintprimaryLevelLevel descriptionmeta.note;phys.atmol.levelchar2S+1[1/7] Spin 2S+1 multiplicityphys.atmol.qnintJ[0/8] J valuephys.atmol.qnfloatE[0/1.81e+6] Target energy (ab initio)cm**-1phys.energy;phys.atmol.leveldoubleJ/A+A/566/A123/table2Transition probabilities and thermally averaged collision strengths for the RM4 calculationElimHigh-energy limitphys.energy;phys.atmol.leveldoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordinti[2/599] Upper level index of the transitionmeta.idintj[1/598] Lower level index of the transitionmeta.idintAEinstein A coefficients**-1phys.atmol.transProbdoubleCS1Averaged collision strength at T=2.42x10^4^Kphys.atmol.collStrengthdoubleCS2Averaged collision strength at T=6.05x10^4^Kphys.atmol.collStrengthdoubleCS3Averaged collision strength at T=1.21x10^5^Kphys.atmol.collStrengthdoubleCS4Averaged collision strength at T=2.42x10^5^Kphys.atmol.collStrengthdoubleCS5Averaged collision strength at T=6.05x10^5^Kphys.atmol.collStrengthdoubleCS6Averaged collision strength at T=1.21x10^6^Kphys.atmol.collStrengthdoubleCS7Averaged collision strength at T=2.42x10^6^Kphys.atmol.collStrengthdoubleCS8Averaged collision strength at T=6.05x10^6^Kphys.atmol.collStrengthdoubleCS9Averaged collision strength at T=1.21x10^7^Kphys.atmol.collStrengthdoubleCS10Averaged collision strength at T=2.42x10^7^Kphys.atmol.collStrengthdouble