Inner- and valence-shell excitation of SF4 studied by photoabsorption and electron energy loss spectroscopy |
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| Affiliation: | 1. Politehnica University Timişoara, Faculty of Industrial Chemistry and Environmental Engineering, 6 Pîrvan Blv., 300223 Timişoara, Romania;2. “Vasile Goldis” Western University of Arad, The Institute of Life Sciences, No. 86, Liviu Rebreanu Street, 310414 Arad, Romania;3. West University of Timisoara, Faculty of Physics, 4 Pîrvan Blv., 300223 Timișoara, Romania;1. The Institute of Problems of Chemical Physics, Russian Academy of Sciences, Prospect Akademika Semenova 1, 142432 Chernogolovka, Russia;2. Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Leninskie gory 1/3, Russia;3. Harvard-Smithsonian Center for Astrophysics, Atomic and Molecular Physics Division, 60 Garden St, Cambridge, MA 02138, USA;1. Faculty of Physics, West University of Timisoara, V. Parvan Ave.4, 300223 Timisoara, Romania;2. Department of Physical Foundations of Engineering, “Politehnica” University of Timisoara, V. Parvan Ave. 2, 300223 Timisoara, Romania;3. Astronomical Institute of the Romanian Academy, Timisoara Astronomical Observatory, A. Sever Sq. 1, 300210 Timisoara, Romania |
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| Abstract: | The S 1s photoabsorption spectrum of SF4 recorded with synchrotron radiation is reported along with the electron energy loss spectrum of SF4 in the regions of S 2p, S 2s and F 1s excitation recorded under dipole dominated conditions. The electron energy loss spectrum of SF4 in the region of valence electron excitation is also reported. All of these spectra are interpreted in terms of a common manifold of upper levels which includes valence levels whose term values reflect the different axial and equatorial S F bond lengths in this molecule. The spectra are good examples of the effects of potential barriers on electronic excitation spectra. |
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