Analysis of Collisional Alignment & Orientation Studied by Scattering of Spin-polarized Electrons from Laser Excited Atoms
I Hertel, Michael H. Kelley, Jabez J. McClelland
A general framework using density matrices is developed for the analysis of atomic excitation by spin-polarized electrons. This framework is applied to the specific case of the 3S1/2rarr} 3P3/2 transition in Na, as studied by the time-reversed, superelastic process. The scattering is characterized in terms of physics parameters describing the collisionally excited p-state, i.e., its angular momentum (Lperp}), linear polarization (Plin), and alignment angle (γ), with these parameters defined separately for singlet and triplet excitation. An expression for the scattering intensity is derived which is valid for arbitrary electron polarization atomic state preparation. Specific examples are discussed with a view toward complete determination o f the relevant scattering amplitudes and phases. Recent experimental results are reevaluated for comparison with theoretical calculations, and suggestions are made for future experiments.
Zeitschrift Fur Physik D-Atoms Molecules and Clusters
, Kelley, M.
and McClelland, J.
Analysis of Collisional Alignment & Orientation Studied by Scattering of Spin-polarized Electrons from Laser Excited Atoms, Zeitschrift Fur Physik D-Atoms Molecules and Clusters
(Accessed December 7, 2023)