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Cross sections for excitation of the b3Σu+, a3Σg+, and c3Πu states of H2 by low-energy electrons

Lima, M. A. P. and Gibson, T. L. and McKoy, V. and Huo, W. M. (1988) Cross sections for excitation of the b3Σu+, a3Σg+, and c3Πu states of H2 by low-energy electrons. Physical Review A, 38 (9). pp. 4527-4536. ISSN 0556-2791. doi:10.1103/PhysRevA.38.4527.

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We used a multichannel extension of the Schwinger variational principle [K. Takatsuka and V. McKoy, Phys. Rev. A 24, 2473 (1981)] to study the cross sections for excitation of the X 1 Σg+→b 3Σu+, a 3Σg+, and c3Πu transitions in H2 by low-energy electrons. These cross sections were obtained with two open channels for each transition and for energies near threshold to 30 eV. The results for the b3Σu+ and a 3Σg+ states agree quite well with available experimental data. However, the cross sections for excitation of the c 3Πu state differ significantly from the measured values at the two energies, 20 and 30 eV, where data are available.

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Additional Information:©1988 The American Physical Society Received 11 April 1988 The authors would like to thank Dr. Barry Schneider and Dr. Lee Collins for many helpful discussions. This material is based upon research supported by the National Science Foundation under Grant No. PHY-8604242, NASA-Ames Cooperative Agreement No. NCC 2-319, and by the Innovative Science and Technoogy Program of the Strategic Defense Initiative Organization under U.S. Army Research Office, Department of the Army ARO Contract No. DAAL 03-86-K-0140. We also acknowledge use of the computer resources of NASA-Ames Research Center and the National Center for Atmospheric Research. One of us (V.M.) would like to thank the Brazilian agencies Coordenacão de Aperfeicoamento de Pessoal do Ensino Superior (CAPES) and Financiadora de Estudos e Projetos (FINEP) for financial support while this manuscript was being written. Two of the authors (V.M. and M.A.P.L.) thank José R. Leite and the Instituto de Fisica, Universidade de São Paulo for their kind hospitality during their visit. One of us (M.A.P.L.) also acknowledges financial support from Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq).
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Deposited On:13 Dec 2006
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