The theoretical treatment of low-energy e+-H2scattering using the Kohn variational method
- 14 September 1990
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 23 (17) , 3057-3074
- https://doi.org/10.1088/0953-4075/23/17/018
Abstract
The authors present calculations of e+-H2 scattering below the positronium formation threshold at 8.63 eV for the Sigma g+, Sigma u+, Pi u and Pi g symmetries using the generalized Kohn method. Mixing of the two lowest partial waves is allowed for in the Sigma g+, Sigma u+ and Pi u symmetries, using a two channel K-matrix. Comparisons with Kohn calculations of the lowest partial waves of these symmetries show that mixing of partial waves has a relatively small effect on the contributions to the total scattering cross section at the energies considered. The Pi g calculation includes only the lowest partial wave. As well as separable short-range correlation functions, the trial functions used in these calculations include Hylleraas-type functions containing the positron-electron distance as a linear factor and functions appropriate for taking into account long-range polarization of the hydrogen molecule.Keywords
This publication has 26 references indexed in Scilit:
- A detailed calculation of the lowest partial wave of Σu+symmetry in low energy e+-H2scatteringJournal of Physics B: Atomic, Molecular and Optical Physics, 1989
- The inclusion of long-range polarisation functions in calculations of low-energy e+-H2scattering using the Kohn methodJournal of Physics B: Atomic, Molecular and Optical Physics, 1989
- The theory of low-energy positron collisions with moleculesPhysics Reports, 1988
- The theoretical treatment of low-energy e+-H2scattering using Kohn trial functions containing Hylleraas-type functionsJournal of Physics B: Atomic and Molecular Physics, 1987
- The inclusion of $\pi$ functions in the treatment of low-energy positron - hydrogen-molecule scattering by a generalisation of the Kohn methodJournal of Physics B: Atomic and Molecular Physics, 1987
- An improved theoretical value for Zefffor low-energy positron-hydrogen-molecule scatteringJournal of Physics B: Atomic and Molecular Physics, 1986
- A calculation of Zefffor low-energy positron-hydrogen-molecule scatteringJournal of Physics B: Atomic and Molecular Physics, 1985
- The inclusion of π functions in the treatment of low-energy positron-hydrogen-molecule scattering by a generalisation of the Kohn methodJournal of Physics B: Atomic and Molecular Physics, 1985
- Application of a generalisation of the Kohn variational method to the calculation of cross sections for low-energy positron-hydrogen-molecule scatteringJournal of Physics B: Atomic and Molecular 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