Electron impact excitation of Gd XXXVII and radiative rates for Ni-like ions with 60

Francis Keenan, Kanti Aggarwal, Patrick Norrington, K.L. Bell, G.J. Pert, S.J. Rose

Research output: Contribution to journalArticlepeer-review

Abstract

Energy levels and radiative rates for transitions among the 107 finestructure levels belonging to the (1s(2)2s(2)2p(6)) 3s(2)3p(6)3d(10), 3s(2)3p(6)3d(9)4l, 3s(2)3p(5)3d(10)4l, and 3s3p(6)3d(10)4l configurations of Ni-like ions with 60 less than or equal to Z less than or equal to 90 have been calculated using the GRASP code. The collision strengths (Omega) have also been computed for transitions in Gd XXXVII at energies below 800 Ryd, using the DARC code. Resonances have been resolved in a fine energy mesh in the threshold region, and excitation rate coefficients have been calculated for transitions from the ground level to excited levels at temperatures below 2500 eV. These have been compared with those available in the literature, and enhancement in the values of rates, due to resonances, has been observed up to an order of magnitude for some of the transitions.
Original languageEnglish
Pages (from-to)313-316
Number of pages4
JournalJournal De Physique Iv
Volume11
Issue number2
Publication statusPublished - 2001

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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