Abstract

Elastic scattering of electrons from nuclei is influenced by the possibility of virtual transitions to excited nuclear states in intermediate states. Such dispersive corrections to electron-deuteron elastic scattering are calculated in second order Born approximation for incident electron energies from 200 to 500 Mev for various values of the momentum transfer. The static second- order Born formulas are also evaluated. Similar, but less accurate, calculations are carried out for He/sup 4/, C/sup 12/, and some heavier elements. These results are used to find small corrections to nuclear radii obtained from an analysis of the Stanford experiments. Dispersive effects on the energy level shifts in bound s states of hydrogenic atoms are calculated, using second-order perturbation theory for the deviation of the nuclear charge distribution from a point charge. These small shifts are evaluated for deuterium and He/sup 4/ and, less accurately, for other nuclei with Z < 50. (auth)

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