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Extended and Revised Analysis of Singly Ionized Tin: Sn II



K. Haris, Alexander Kramida, A. Tauheed


The electronic structure of singly ionized tin (Sn II) is partly a one-electron and partly a three-electron system with ground configuration 5s25p. The excited configurations are of the type 5s2nℓ in the one-electron part, and 5s5p2, 5p3 and 5s5pnℓ (nℓ = 6s, 5d) in the three-electron system with quartet and doublet levels. The spectrum analyzed in this work was recorded on a 3 m normal incidence vacuum spectrograph of the Antigonish laboratory (Canada) in the wavelength region 300-2080 Å using a triggered spark source. The existing interpretation of the one-electron level system was confirmed in this paper, while the 2S1/2 level of the 5s5p2 configuration has been revised. The analysis has been extended to include new configurations 5p3, 5s5p5d and 5s5p6s with the aid of superposition-of-configurations Hartree-Fock calculations with relativistic corrections. The ionization potential obtained from the ng series was found to be 118023.7(5) cm−1 (14.63307(6) eV). We give a complete set of critically evaluated data on energy levels, observed wavelengths and transition probabilities of Sn II in the range 888-10740 Å involving excitation of the n = 5 electrons.
Physica Scripta


Atomic spectroscopy, atomic data, energy levels, spectral lines, wavelengths, ionization potential, transition probabilities.


Haris, K. , Kramida, A. and Tauheed, A. (2014), Extended and Revised Analysis of Singly Ionized Tin: Sn II, Physica Scripta, [online], (Accessed May 27, 2024)


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Created October 27, 2014, Updated October 12, 2021