Application of the Schwinger multichannel formulation to electron-impact excitation of the B 1Σu+ state of H2

Creators: Gibson, Thomas L.; Lima, Marco A. P.; McKoy, Vincent; Huo, Winifred M.

Abstract

In this paper we report cross sections for electron-impact excitation of the X 1Σg+→B 1Σu+ transition in H2 for collision energies of 15, 20, and 30 eV. For this dipole-allowed transition with its associated long-range potential, the contributions of the more strongly scattered low-angular-momentum partial waves to the cross section were obtained from a two-state Schwinger multichannel calculation, and a modified Born-closure scheme was used to include the contributions from the remaining weakly scattered partial waves. Agreement between the calculated differential cross sections and available experimental data is encouraging.

Additional Information

©1987 The American Physical Society. Received 12 September 1986. This material is based upon research supported by the National Science Foundation under Grant No. PHY-82-13992 and by NASA-Ames Cooperative Agreement No. NCC2-3 19. One of us (M.A.P.L.) acknowledges financial support from the Comissão Nacional de Energia Nuclear (CNEN), Rio de Janeiro, Brazil, and from Fundação de Amparo à Pesquisa do Estado de São Paulo, São Paulo, Brazil. The research of W.M.H. is supported by the National Aeronautics and Space Administration through NASA-Ames Cooperative Agreement No. NCC2-147.

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