Eur. Phys. J. D 5, 229-235 (1999)
https://doi.org/10.1007/s100530050250

Various total cross-sections for electron impact on C₂H₂, C₂H₄ and CH_3X (X = CH₃, OH, F, NH₂)

¹ Department of Physics, Sardar Patel University, Vallabh Vidyanagar, 388 120 Gujarat, India
² V.P. & R.P.T.P. Science College, Vallabh Vidyanagar, 388 120 Gujarat, India

Received: 20 April 1998
Revised: 3 August 1998
Accepted: 14 August 1998
Published online: 15 February 1999

Abstract

Cross-sections for the impact of electrons having energy eV are evaluated for polyatomic molecules , , , , and . Total (complete) cross-sections and total inelastic cross-sections are calculated for these targets by employing the atomic optical potentials and additivity rules. A variant of our previous work, to be called MAR-SC has been developed for molecules such as the present ones, where two approximately independent scattering centres can be identified. We find a good general accord of our theoretical values with various experimental data. Also given presently is an analytical fit , incorporating polarizability , for the high energy total cross-sections for 18-electron targets. Tentative upper and lower limits for the electron molecule total ionization cross-sections are identified and a break-up into elastic and inelastic contributions is exhibited.