Total cross section measurements for positron and electron scattering on hydrocarbons between 5 and 400 eV
- 28 August 1985
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 18 (16) , 3347-3359
- https://doi.org/10.1088/0022-3700/18/16/019
Abstract
The total cross sections of methane, ethane, ethene, propane, propene, cyclopropane, n-butane, isobutane and 1-butene were measured in a transmission experiment utilising positrons from a 22Na source and a tungsten moderator and electrons from a thermionic cathode. As expected the cross sections for positrons are smaller than those for electrons and both grow with the size of the molecules. Above 30 eV the positron and electron cross sections decrease with increasing energy and approach each other. All measured positron and electron cross sections between 100 and 400 eV can be described by a formula containing the energy, the number of molecular electrons and only three fit parameters.Keywords
This publication has 28 references indexed in Scilit:
- Total and partial electron collisional ionization cross sections for CH4, C2H6, SiH4, and Si2H6The Journal of Chemical Physics, 1984
- Total scattering cross sections for low-energy positrons in the molecular gases H2, N2, CO2, O2and CH4Journal of Physics B: Atomic and Molecular Physics, 1983
- Low energy positrons from metal surfacesSurface and Interface Analysis, 1980
- Total scattering cross sections for intermediate-energy positrons in the molecular gases H2, O2, N2, CO2and CH4Journal of Physics B: Atomic and Molecular Physics, 1980
- Cross sections for positronium formation in gasesJournal of Physics B: Atomic and Molecular Physics, 1979
- Low energy electron scattering from methaneThe Journal of Chemical Physics, 1979
- Radiation from CH4 and C2H4 produced by electron impactPhysica, 1971
- Partial Ionization Cross Sections of He, Ne, H2, and CH4 for Electrons from 20 to 500 eVThe Journal of Chemical Physics, 1966
- Wirkungsquerschnitt und Molekelbau in der Kohlenwasserstoffreihe: CH4-C2H6-C3H8-C4H10Annalen der Physik, 1930
- The Absorption Coefficient for Slow Electrons in GasesPhysical Review B, 1925