Complete determination of scattering amplitudes for a collisionally excited D state: Li(2s to 3d) excitation in Li-He collisions
- 28 April 1984
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 17 (8), 1559-1573
- https://doi.org/10.1088/0022-3700/17/8/017
Abstract
The possibility of a complete determination of the scattering amplitudes for a D state produced by a collisionally induced coherent S to D excitation is investigated. A polarisation analysis of the subsequent D to P dipole transition by the photon-particle coincidence method is not sufficient to completely determine the excitation amplitudes for the D state. Additional information can be obtained from collision experiments performed in the presence of symmetry-breaking electromagnetic fields. In the case of Li(3d2D), the combined action of an external magnetic field and the spin-orbit coupling has been utilised. The results of the first coincident level crossing experiment is reported, allowing an unambiguous determination of the excitation amplitudes for the Li(3d2D) state produced in Li-He collisions.Keywords
This publication has 5 references indexed in Scilit:
- Coherence study of S→D excitation: Li(2s→3d) excitation of Li-He collisionsJournal of Physics B: Atomic and Molecular Physics, 1983
- Differential excitation studies of quasi-one-electron systems. III. Be II 22P excitation, alignment and orientation in Be+-He, Ne, Ar collisionsJournal of Physics B: Atomic and Molecular Physics, 1980
- Direct excitation of Li I (nl) levels in keV Li-He collisionsJournal of Physics B: Atomic and Molecular Physics, 1978
- Photon Vector Polarization and Coherence Parameters in an Electron-Photon Coincidence Experiment on HeliumPhysical Review Letters, 1976
- Impact Excitation and Polarization of the Emitted LightReviews of Modern Physics, 1973