Elastic scattering, vibrational excitation, and attachment in low-energy electron-SF{sub 6} scattering: Experiment and effective range theory
- Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588-0111 (United States)
Cross sections at low energies for vibrationally elastic and inelastic scattering, as well as electron attachment to SF{sub 6}, have been calculated using a multichannel effective range theory (ERT) with complex boundary conditions. The most active vibrational modes, the totally symmetric mode {nu}{sub 1} and the infrared active mode {nu}{sub 3}, have been included in the calculation. The ERT parameters were fitted to reproduce the experimental total and attachment cross sections. Differential elastic and vibrational excitation cross sections have been measured at 30 deg. and 135 deg. using a spectrometer with hemispherical analyzers. The calculation reproduces correctly the magnitudes and shapes of the differential elastic and {nu}{sub 1}, {nu}{sub 3}, and 2{nu}{sub 1} excitation cross sections, in particular the sharp structures at vibrational thresholds. The s- and p-wave phase shifts obtained in the present analysis differ from those recently derived by Field et al. [Phys. Rev. A, 69, 052716 (2004)].
- OSTI ID:
- 20650092
- Journal Information:
- Physical Review. A, Vol. 71, Issue 2; Other Information: DOI: 10.1103/PhysRevA.71.022712; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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