Abstract
Higher-order effects are calculated in the framework of the eigenchannel theory for elastic and inelastic electron-nucleus scattering in the energy region MeV. A dispersion effect of about 12% is found for the elastic scattering on at a momentum transfer MeV/c. For inelastic scattering, the reorientation effect is discussed, in addition to the dispersion effect. The total higher-order effect changes the form factor for a hindered first-order transition by 50% at its minima. Furthermore, the dependence of the higher-order effects on the transition potentials of the virtual excitations, the model dependence, and the dependence on the energy of the electron and the momentum transfer are discussed. A closed formula for the matrix is developed by calculating the eigenchannels in stationary perturbation theory.
- Received 4 November 1968
DOI:https://doi.org/10.1103/PhysRev.186.1044
©1969 American Physical Society