Total-cross-section measurements for positron and electron scattering by , , and
- 1 August 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 38 (3), 1207-1216
- https://doi.org/10.1103/physreva.38.1207
Abstract
Total cross sections (’s) have been measured for 1–500-eV positrons and electrons scattered by , , and using a beam-transmission technique. The positron ’s are compared with the corresponding electron ’s for each target gas. It is found that the positron ’s are, in general, lower than the electron results. There are no prominent structures observed for positron scattering at low energies that would be comparable to the narrow shape resonances observed for electrons scattering from various molecules, such as . The positron curve for reveals a significant increase in the vicinity of its positronium formation threshold, while the and curves are monotonically increasing in this vicinity. At the highest energies investigated, there are indications of a tendency toward merging of the positron and electron ’s for these gases. Interesting similarities are found in a comparison of the present positron and electron curves for with prior comparison measurements for argon.
Keywords
This publication has 33 references indexed in Scilit:
- Total-Scattering Measurements and Comparisons for Collisions of Electrons and Positrons withOPhysical Review Letters, 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
- Angular distribution of electrons elastically scattered from: 2.0-200-eV impact energyPhysical Review A, 1982
- Measurements of total scattering cross sections for intermediate-energy positrons and electrons colliding with helium, neon, and argonPhysical Review A, 1981
- 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
- Transmission experiment for measuring total positron–atom collision cross sections in a curved, axial magnetic fieldReview of Scientific Instruments, 1977
- Total Electron Scattering Cross Sections inand NePhysical Review A, 1970
- On the Scattering of Slow Positrons by MoleculesJournal of the Physics Society Japan, 1967
- Absolute Measurements of Total Cross Sections for the Scattering of Low-Energy Electrons by Atomic and Molecular OxygenPhysical Review B, 1967
- Wirkungsquerschnitt und MolekülbauAnnalen der Physik, 1927