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Polarisation, alignment and spin asymmetry in electron-sodium resonant scattering

A two-potential localised exchange approach is used to study the dynamics of the atomic collision process in electron impact excitation of the resonant transition in sodium at three intermediate energies: 12.1, 22.1 and 30 eV. Results are presented for the angular variation of the components of polarisation (P1, P2 and P3) of the radiation emitted normal to the scattering plane. From these results the coherence of excitation and the alignment of the charge cloud ( gamma ) are investigated. Differential and total spin asymmetry in the scattering of spin-polarised electrons with spin-polarised sodium are also studied.