Electron scattering from helium atoms. Phase shifts, resonance parameters and total cross sections
- 28 November 1996
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 29 (22) , 5513-5526
- https://doi.org/10.1088/0953-4075/29/22/025
Abstract
The `R-matrix with pseudostates' (RMPS) method has been used to calculate low-energy phase shifts, positions and widths of resonances near the n = 2 thresholds, integrated cross sections for all transitions between the , , , and states of helium, and ionization cross sections at total collision energies up to 80 eV. The use of sophisticated target states has enabled accurate results to be obtained at low energies, and good agreement with results from the `convergent close-coupling' (CCC) method and the available experimental data to be obtained at intermediate energies.Keywords
This publication has 39 references indexed in Scilit:
- Electron-impact ionization of atomic hydrogen from the 1S and 2S statesJournal of Physics B: Atomic, Molecular and Optical Physics, 1996
- Convergentmatrix with pseudostates calculation for-He collisionsPhysical Review A, 1996
- -wave model for electron-hydrogen scatteringPhysical Review A, 1996
- Differential cross sections and electron-impact coherence parameters for electron scattering from helium atomsJournal of Physics B: Atomic, Molecular and Optical Physics, 1996
- Electron - atom scattering at low and intermediate energies using a pseudo-state/R-matrix basisJournal of Physics B: Atomic, Molecular and Optical Physics, 1996
- Differential cross sections and angular correlation parameters for electron impact excitation of the 33P, 31D and 33D states of heliumJournal of Physics B: Atomic, Molecular and Optical Physics, 1988
- Electron excitation in helium: including the n=4 levels in an R-matrix calculationJournal of Physics B: Atomic and Molecular Physics, 1987
- Electron excitation from the 11S, 23S and 21S states of helium. An eleven-state R-matrix calculationJournal of Physics B: Atomic and Molecular Physics, 1985
- Low energy scattering of electrons by helium atomsJournal of Physics B: Atomic and Molecular Physics, 1975
- andStates of the Helium Isoelectronic Sequence up toPhysical Review A, 1971