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- Title
A theoretical investigation of the S<sub>2</sub><sup>+</sup> cation in the gas phase.
- Authors
Yu, Wei; Zhu, Zunlue; Cheng, Chuncai; Shi, Deheng
- Abstract
The potential energy curves (PECs) of 18 lowest energy Λ-S states of the S2+ cation have been calculated using the complete active space self-consistent field method followed by the internally contracted multireference configuration interaction approach with the Davidson modification. When spin−orbit coupling is computed using the Breit−Pauli Hamiltonian with the cc-pCVTZ basis set, the 18 Λ-S states split into 56 Ω components. To improve the quality of the PECs, core−valence correlation and scalar relativistic corrections are included. All PECs are extrapolated to the complete basis set limit. Based on the PECs obtained by the icMRCI+CV+DK+Q/(CBS-56) calculations, the spectroscopic parameters of 17 Λ-S bound states and 50 Ω bound states are obtained. The transitions (including the Franck−Condon factors and radiative lifetimes) from two low-lying states to the ground state are calculated for several low vibrational levels. Analyses show that the spectroscopic parameters reported here can be expected to be reliably predicted.
- Subjects
HAMILTONIAN systems; RADIATIVE lifetime; POTENTIAL energy; FRANCK-Condon principle; ENERGY bands; GAS phase reactions; SPIN-orbit coupling constants
- Publication
Canadian Journal of Chemistry, 2014, Vol 92, Issue 11, p1041
- ISSN
0008-4042
- Publication type
Article
- DOI
10.1139/cjc-2014-0255