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arXiv · 1612.00747

Optical spectroscopy of complex open 4$d$-shell ions Sn$^{7+}$-Sn$^{10+}$

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

We analyze the complex level structure of ions with many-valence-electron open [Kr] 4$d^\textrm{m}$ sub-shells ($\textrm{m}$=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 Sn$^{7+}$-Sn$^{10+}$ ions were obtained using an electron beam ion trap. Semi-empirical 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, the most complete data set available to date for these ground configurations, confirm the ab initio predictive power of CI+MBPT calculations for the these complex electronic systems.

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F. Torretti, A. Windberger, A. Ryabtsev, S. Dobrodey, H. Bekker, W. Ubachs, R. Hoekstra, E. V. Kahl, J. C. Berengut, J. R. Crespo López-Urrutia, O. O. Versolato. 2016-12-02. Optical spectroscopy of complex open 4$d$-shell ions Sn$^{7+}$-Sn$^{10+}$. https://doi.org/10.1103/physreva.95.042503

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