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Identification and theoretical investigation of the SiO(2+) dication

Abstract : The gas-phase diatomic dication SiO(2+) has been observed by mass spectrometry and identified by its isotopic abundance. It was produced by energetic, high-current oxygen ((16)O ) ion beam sputtering of a silicon surface and survived a flight time of similar to 10 (5) s. In addition, a detailed theoretical study of SiO2+ has been performed. Our calculations show that SiO(2+) is a metastable species with a large potential barrier towards dissociation (similar to 1.55 eV for the SiO(2+) X ground state). We have derived a set of accurate spectroscopic constants and transition energies for SiO(2+). The adiabatic double ionization energy of SiO is similar to 31 eV. (C) 2009 Elsevier B. V. All rights reserved.
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Submitted on : Tuesday, May 1, 2012 - 3:38:37 PM
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S. Ben Yaghlane, N. E. Jaidane, K. Franzreb, M. Hochlaf. Identification and theoretical investigation of the SiO(2+) dication. Chemical Physics Letters, Elsevier, 2010, 486 (1-3), pp.16--20. ⟨10.1016/j.cplett.2009.12.081⟩. ⟨hal-00692873⟩



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