Total cross-sections for positron scattering by a series of molecules |
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Authors: | J. Sun G. Yu Y. Jiang S. Zhang |
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Affiliation: | (1) CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, P.R. China, CN;(2) Department of Physics, Henan Normal University, Xinxiang 453002, Henan, P.R. China, CN;(3) Department of Fundamental Science, the Second Artillery Command Institute, Wuhan 430012, Hubei, P.R. China, CN |
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Abstract: | The additivity rule is employed to obtain the total (elastic+inelastic) cross-sections for positron scattering from molecules including a number of diatomic, polyatomic molecules (H2, N2, HCl, CO2, NH3, SF6, CH4, C2H4 and C3H8) over an incident energy range of 10-1000 eV. The total cross-sections (TCS) of the constituent atoms of molecules are obtained by employing a complex optical model potential (composed of static, polarization and absorption potential). The present results are compared with experimental data and other theoretical calculations, good agreement is obtained in intermediate- and high-energy region. Received: 11 November 1997 / Revised: 23 March 1998 / Accepted: 16 June 1998 |
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Keywords: | PACS. 34.80.Gs Molecular excitation and ionization by electron impact |
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