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Recent calculations of Nuclear Matter properties performed within the framework of the Brueckner - Bethe - Goldstone theory and the variational approach based on Jastrow - type wave functions are reviewed. The information that can be gained on the nucleon - nucleon interaction is discussed and the overbinding of Nuclear Matter predicted by the Reid Soft Core interaction is pointed out.
Different theories of meson-exchange currents are discussed. It is shown that what we call meson-exchange currents is clearly a matter of definition and is strongly related to the corresponding nucleon-nucleon potentials. The exchange current operators are discussed to the order of 1/M3 (M nucleon mass). Special attention has been paid to the electric dipole operator in the long wavelength limit showing...
The present status of the theory of exchange current effects as seen in electron scattering off nuclei is reviewed. The most important pion exchange mechanisms and their experimental consequences are discussed in some detail.
Deuteron break-up by inelastic electron scattering or photoabsorption is discussed with emphasis on effects from meson exchange currents and isobar configurationgurations.
Since 1975,when this apparatus became fully operational for coincidence experiments, the following reactions have been studied :- 12C(e,e'p) in different kinematical conditions, to study the reaction mechanism.-D(e,e')n as discussed in D. Royer's talk. (e,e'p) on 16O and 9Be, to get the spectral function for E≲120 Mev and p≲400 Mev/c. A 3He(e,e'p) experiment is planned for...
This paper presents a partial survey of the importance of three-nucleon systems in nuclear physics. The main emphasis is on the relevance of three-nucleon systems as a source of information on two- and three- nucleon forces, on meson exchange currents in electromagnetic and weak interactions and on the nuclear interactions of pions.
Electromagnetic processes associated with the three-nucleon systems are discussed with an emphasis on recent developments. These include the asymptotic behavior of the 3He charge form factor, electro- and photo-disintegrations and the electric dipole sum rule for total photo absorption cross-sections.
A new harmonic oscillator basis for trinucleon ground-state calculations is presented, featuring different oscillator radii for the two intrinsic variables. This basis allows charge-dependent interactions to be handled and yields a better convergence with respect to previously used oscillator bases. The results for the triton binding energy and for the charge form factors of 3H and 3He with the Reid...
The nuclear charge asymmetry in the A = 3 system is determined by making a perturbative estimate of the direct electromagnetic contribution to the 3He-3H binding-energy difference. Only 8±29 keV of the experimental binding-energy difference has to be attributed to nuclear charge asymmetry, an amount smaller than previous estimates.
3He (e, e) data up to q = 10fm−1 are compared to charge form factor calculations for Faddeev- and variational wave functions. The model independent point density extracted from the data corrected for MEC and relativistic effects displays a surprising feature, a pronounced central depression.
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