Electron-photon angular correlations in electron-molecule scattering

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Abstract
The density-matrix formulation of the theory of electron-photon coincidence experiments is applied to the case of electron scattering from molecules obeying the Hund's case (b) coupling scheme. The results are given in a form in which the measured quantities are related directly to the scattering amplitudes. The general results are then specialised to the case in which the scattered electrons are not observed, and are compared to those obtained by other authors. Threshold polarisation is discussed briefly and discrepancies between previously obtained results considered.