Experimental study of total cross sections for positron and electron scattering by SF{sub 6} molecules
- Graduate School of Sciences, Kyushu University, Fukuoka 812-8581 (Japan)
- Graduate School of Science and Engineering, Yamaguchi University, Ube 755-8611 (Japan)
The total cross sections (TCSs) for 0.2-1000 eV positrons and for 0.8-1000 eV electrons colliding with SF{sub 6} molecules were measured by a relative method. In the present TCS investigation for electrons, peaks attributed to the a{sub 1g}, t{sub 1g}, t{sub 2g}, and e{sub g} shape resonances identified earlier were observed clearly at 2.2, 7.0, 12.5, and 30 eV. In positron TCSs, a hump centered at about 2.6 eV was observed, followed by a larger and broader peak at around 50 eV. These TCSs are compared with those for C{sub 2}F{sub 6} molecules, a hexafluoro molecule showing roughly comparative structures at higher energies than 100 eV, a feature that is attributable to the similarity in molecular size and polarizability. Especially for positron scattering, the TCSs are quite similar to each other over all the energy range investigated. Possible rationales for this similarity are provided.
- OSTI ID:
- 20645892
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 70; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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