Interferences in electron emission from O2 by 30 MeV O impact |
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Authors: | M. Winkworth M.E. Galassi B.S. Dassanayake A. Kayani |
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Affiliation: | a Department of Physics, Western Michigan University, Kalamazoo, MI 49008, USA b CNEA, Centro Atómico Bariloche, Avenida E. Bustillo 9500, 8400 Bariloche, Argentina c Instituto de Física Rosario (CONICET-UNR) and Facultad de Ciencias Exactas, Universidad Nacional de Rosario, Avenida Pellegrini 250, 2000 Rosario, Argentina |
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Abstract: | Interference structures in the ejected electron spectra for 30 MeV O5,8+ + O2 are investigated. The measured electron yields were studied for electron energies from 5 to 400 eV and observation angles of 30°, 60°, 90°, 120° and 150° with respect to the incident beam direction. Experimental molecular cross-sections were normalized to theoretical molecular one-center cross-sections revealing oscillatory structures suggestive of secondary interferences as evidenced by the independence on the observation angle. An oscillation interval for 30 MeV O5,8+ + O2 of Δk ∼ 4 a.u. is found, a value two times larger than that previously observed for 3 MeV H+ + N2. No obvious evidence for primary Young-type interferences was seen. |
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Keywords: | 34.50.Fa 32.80.Fb |
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