Sensitivity of differential cross sections and angular correlation parameters to scattering parameters
- 28 October 1979
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 12 (20) , 3399-3414
- https://doi.org/10.1088/0022-3700/12/20/018
Abstract
Discusses methods for calculating distorted-wave amplitudes. It is difficult to compare the relative merits of these calculations since widely different atomic potentials and wavefunctions have been used in the various calculations. The authors have examined these different approximations by calculating different distorted-wave amplitudes using a common Hartree-Fock basis for atomic potentials and wavefunctions. This procedure allows one to examine the relative effects of different types of approximations. For purposes of comparison, they have calculated differential cross sections and angular correlation parameters for electron impact excitation of the 21P and 31P allowed transitions of helium for incident electron energies in the range 40-200 eV. All of the calculations include both the direct and exchange amplitudes, and calculations were performed using both a static atomic distorting potential and a complex optical potential which included polarisation, exchange and absorption distortion in addition to the distortion of the static potential.Keywords
This publication has 41 references indexed in Scilit:
- Electron impact excitation of the 21P and 23S levels of heliumJournal of Physics B: Atomic and Molecular Physics, 1979
- Electron scattering by atoms at intermediate energies II. Theoretical and experimental data for light atomsPhysics Reports, 1978
- Electron impact excitation of hydrogenic systems in a distorted-wave modelJournal of Physics B: Atomic and Molecular Physics, 1978
- Electron scattering by atoms at intermediate energies: I. Theoretical modelsPhysics Reports, 1977
- Elastic scattering of electrons and positrons by complex atoms at intermediate energiesPhysical Review A, 1977
- Experimental-theoretical comparisons of 11S→31P differential magnetic sublevel cross sections for electron-helium scattering at 80 and 100 eVJournal of Physics B: Atomic and Molecular Physics, 1976
- Equivalent exchange potentials in electron scatteringJournal of Physics B: Atomic and Molecular Physics, 1976
- The use of second-order potentials in the theory of scattering of charged particles by atoms. X. Electron impact excitation of the helium 21P magnetic substatesJournal of Physics B: Atomic and Molecular Physics, 1976
- The use of second-order potentials in the theory of scattering of charged particles by atoms. IX. The excitation of hydrogen and helium to the n=2, S levels by electron impactJournal of Physics B: Atomic and Molecular Physics, 1975
- Ab-initio optical model theory of elastic electron-atom scatteringPhysics Letters A, 1974