Electron-impact excitation oflevels of helium at intermediate energies
- 1 May 1979
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 19 (5), 1841-1851
- https://doi.org/10.1103/physreva.19.1841
Abstract
Five-state close-coupling equations for electron-helium scattering are solved in the energy region from 30 to 100 eV. Integral and differential cross sections for excitation of the ground state to the states , , , and are presented. Calculated shapes of differential cross sections versus angle for various energies are in fair agreement with measurements, but the magnitudes of the cross sections are overestimated. Allowance for coupling between and brings calculated differential cross sections into good quantitative agreement with experiment.
Keywords
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