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Type: Artigo de periódico
Title: Superelastic collisions of electrons with the c(3)Pi(u) metastable state in hydrogen dc positive column
Author: Amorim, J
Lino, JLS
Loureiro, J
Lima, MAP
da Paixao, FJ
Abstract: We investigated the effect of superelastic electronic collisions of electrons, with the c (3)Pi(u) state of the H-2 molecule, on the electron energy distribution function (eedf) of a de positive column. We use a recently calculated set of electronic superelastic collision cross-sections [C.S. Sartori, F.J. da Paixao, M.A.P. Lima, Phys. Rev. A 55 (1997) 3243] to study the effect of these collisions on the eedf, the transport parameters, ionization and dissociation rates. We include two possible pathways, c (3)Pi(u) --> b (3)Sigma(u)(+) and c (3)Pi(u) --> X (1)Sigma(g)(+), for superelastic collisions of electrons with molecules in the metastable state. Cross-sections of the order of 10(-14) cm(2) at low energy enhance the eedf tail by superelastic electronic collisions, in particular for low reduced electric field E/N. This result changes considerably the dissociation and ionization rates by six orders of magnitude in the region from 10 to 50 Td. (C) 1999 Elsevier Science B.V. All rights reserved.
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/S0301-0104(99)00166-4
Date Issue: 1999
Appears in Collections:Unicamp - Artigos e Outros Documentos

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