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Author(s):
H. Kato, M. Hoshino, H. Kawahara, C. Makochekanwa, S.J. Buckman, M.J. Brunger, H. Cho, M. Kimura, D. Kato, H.A. Sakaue, I. Murakami, T. Kato and H. Tanaka
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Title:
Cross Sections for Electron-induced Resonant Vibrational Excitations in Polyatomic Molecules
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Date of publication:
Mar. 3, 2009
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Key words:
electron-molecule collisions, vibrational excitation processes, excitation functions, resonant electron scattering
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Abstract:
We continue our review of experimental data for electron-polyatomic molecule collisions in connection with fusion and processing plasmas, as well as with the associated environmental issues. In this case we focus on vibrational excitation processes, in particular what vibrational modes can be identified in electron energy loss experiments and which of these modes are resonantly enhanced due to the temporary capture of the incident electron by the species in question. In this latter respect we report indicative excitation function data, all of which were originally measured at Sophia University and for which the differential cross section, for excitation of the relevant mode, are studied as a function of the incident electron energy at a fixed scattered electron angle. Unlike our previous compilation (NIFS–DATA–101) for elastic scattering, which was conducted over a broad range of energies (1–100 eV), vibrational excitation cross sections usually only become significant when the resonance enhancement process occurs. As a consequence, this survey encompasses incident electron energies between 1–30 eV. Consistent with our first report, no detailed comparison is made here with any other data that might be available in the literature. This course of action was once again adopted in order to keep this report to a sensible length.
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