Optical spectroscopy of complex open 4d-shell ions Sn7+ - Sn10+

F. Torretti, R.A.W. Windberger, A. Ryabtsev, S. Dobrodey, H. Bekker, W. Ubachs, R. Hoekstra, E. V. Kahl, Julian C. Berengut, J. R. Crespo López-Urrutia, O. Versolato

Research output: Contribution to JournalArticleAcademicpeer-review


We analyze the complex level structure of ions with many-valence-electron open-[Kr] 4dm subshells (m=7–4) with ab initio calculations based on configuration-interaction many-body perturbation theory (CI+MBPT). Charge-state-resolved optical and extreme ultraviolet (EUV) spectra of Sn7+–Sn10+ ions were obtained using an electron beam ion trap. Semiempirical spectral fits carried out with the orthogonal parameters technique and cowan code calculations lead to 90 identifications of magnetic-dipole transitions and the determination of 79 energy ground-configuration levels, questioning some earlier EUV-line assignments. Our results confirm the ab initio predictive power of CI+MBPT calculations for these complex electronic systems.
Original languageEnglish
Article number042503
Pages (from-to)1-16
Number of pages16
JournalPhysical Review A
Issue number4
Early online date10 Apr 2017
Publication statusPublished - Apr 2017


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