Elsevier

Annals of Physics

Volume 87, Issue 2, October 1974, Pages 289-326
Annals of Physics

Dispersion corrections to elastic electron scattering by 12C and 16O II. On the use of the closure approximation

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Abstract

Within the framework of the closure approximation dispersion corrections to elastic electron scattering from 12C and 16O have been calculated using the Harmonic Oscillator Shell Model and keeping only the Coulomb contributions to the dispersive part of the second-Born amplitude. Center-of-mass effects and recoil have been taken into account. By means of an expansion scheme, the first-order corrections to the closure approximation have also been calculated and under certain conditions, it is believed that the corrected expansion is a valid one. It is found that the effective excitation energy, defined by the expansion, is approximately one oscillator spacing. The relation between this calculation and a previous one by deForest [26] is discussed.

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    This work supported in part by The U. S. Atomic Energy Commission under Contracts AEC AT(11-1)-3235 and AEC AT(11-1)-3069.

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