Ritu Raizada
Articles written in Pramana – Journal of Physics
Volume 46 Issue 6 June 1996 pp 431-449
Positron scattering from hydrocarbons
The total cross sections for positron impact on hydrocarbons have been calculated using the additivity rule in which the total cross section for a molecule is the sum of the total cross section for the constituent atoms. The energy range considered is from a few eV to several thousand eV. The total cross sections for positron impact on an atom are calculated by employing a complex spherical potential which comprises of a static, polarization and an absorption potential. We have good agreement with the experimental results for hydrocarbons for positron energy ⩾100 eV. Our results also agree with the available calculations for CH4 and C2H2 which employed full molecular wavefunctions beyond 100 eV. Our absorption cross sections also agree with molecular wave-function calculations for C2H2 and CH4 beyond 100 eV. We have shown the Bethe plots for
Volume 47 Issue 1 July 1996 pp 87-98 Research Articles
Positron scattering from alkaline-earth elements
The total (elastic + inelastic) cross sections for
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