Journal article
Circular polarization of the 3D state of atomic hydrogen excited by electrons
Journal of Physics B: Atomic, Molecular and Optical Physics, Vol.26(14), pp.2165-2177
1999
Abstract
The theory of the circular polarization from the 32D state is analysed and angular correlation formulae are derived for the scattered n — 1 electron and the cascade Lyman-alpha radiation. The formulae include allowance for the polarization of the intermediate-state 2p electron from the LS coupling in the time evolution of the decay of the coiiisionally excited n = 32D states. The effect of a finite coincidence time window is also examined. The predictions of the model are compared with the model which assumes that the intermediate-state 2p electron is unpolarized. New experimental data at an incident electron kinetic energy of 54.4 eV are reported and indicate the circular polarization of the Lyman-alpha radiation has small negative values from 10° to 120°. The theoretical predictions of the correlation are illustrated in a six-state close-coupling model which gives a minimum at forward angles but does not agree quantitatively with the experimental data.
Details
- Title
- Circular polarization of the 3D state of atomic hydrogen excited by electrons
- Authors/Creators
- M. Kumar (Author/Creator)A.T. Stelbovics (Author/Creator)J.F. Williams (Author/Creator) - School of Physics and Astrophysics
- Publication Details
- Journal of Physics B: Atomic, Molecular and Optical Physics, Vol.26(14), pp.2165-2177
- Publisher
- Institute of Physics
- Identifiers
- 991005542902907891
- Copyright
- © 1993 IOP Publishing Ltd.
- Murdoch Affiliation
- Centre for Atomic, Molecular and Surface Physics
- Language
- English
- Resource Type
- Journal article
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