Physical Review A
Using a powerful laser-based experimental method, the cross section for electron excitation of Na(3S) atoms to the Na(3P) state has been decomposed into partial components with respect to changes in the spin and angular momentum of the atomic electron, and these partial cross sections are further reduced to their differential character with respect to the electron scattering angle. Partial, differential cross sections are reported for electron collision energies from threshold 2.1 to 3.6 eV, and compared to available calculations.
Han, Xianming; Schwinn, G. W.; and Gallagher, A., "Differential, Partial Cross Sections for Electron Excitation of the Sodium 3P State" Physical Review A / (1990): -.
Available at http://digitalcommons.butler.edu/facsch_papers/761