Schwinger multichannel method: A study of a Feshbach resonance in e-H_2 collisions

Creators: da Silva, Antônio J. R.; Lima, Marco A. P.; Brescansin, Luiz M.; McKoy, Vincent

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Abstract

We present results of the application of the Schwinger multichannel method to study the role of Feshbach resonances on the elastic and electronic excitation cross sections in e-H_2 collisions. Using a ^2Σ_g^+2 resonance associated with the a ^3Σ^+_g and E^1Σ^+_g states of H_2 as an example, we quantitatively illustrate the dramatic influence of open channels on the decay of such Feshbach resonances in electron-molecule collisions.

Additional Information

© 1990 American Physical Society. (Received 29 June 1989; revised manuscript received 27 December 1989) This work was supported by the Brazilian agency Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) and the National Science Foundation (NSF) through the U.S.-Brazil Scientific Cooperative Program. M.A.P.L. and L.M.B. acknowledge financial support from CNPq. V.M. also acknowledges support from the NSF under Grant No. PHY-8604242, from U.S. Army Research Office under Contract No. DAAL03-86-K-0140, and from Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES). M.A.P.L. and V.M. thank Professor J. R. Leite and the Institute of Physics of the University of Sao Paulo for their kind hospitality.

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