Short-range correlations and meson exchange currents in photonucleon emission

Abstract

One-nucleon emission processes induced by photon absorption are studied by considering short-range correlations effects. At energies above the giant resonance region the validity of the direct knock-out model has been tested by comparison with continuum Random Phase Approximation results. Nucleon re-scattering effects have been considered by using an optical potential. The role of the electromagnetic convection, magnetization and meson exchange currents has been investigated as a function of both excitation energy and momentum transfer. The short-range correlation effects have been studied by using various correlation functions. We found that the nucleon photo-emission cross section is rather sensitive to the presence of short-range correlations at large values of nucleon emission angle. In this region, however, the effects of meson exchange currents are even larger than those produced by short-range correlations.

37 pages, 20 figures in postscript, Text in LaTeX

References in corpus (3)

• One Body Density Matrix, Natural Orbits and Quasi Hole States in 16O and 40Ca
• Correlations and charge distributions of medium heavy nuclei
• Short-range correlations in semi-exclusive electron scattering experiments

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