Tel-Aviv University, ISRAEL
Short-Range nucleon-nucleon correlations, primarily between proton-neutron pairs, in nuclear systems shift about 25% of the nucleons in Symmetric Nuclear Matter (SNM) from below the fermi momentum to above it but have little if any effect on pure neutron matter (PNM). In this talk we use results from recent studies of correlations in heavy nuclei to derive an analytical Correlated Fermi-Gas (CFG) model for the momentum distribution of nucleons in SNM.
We benchmark our model against microscopical calculations of the average kinetic energy of nucleons in heavy nuclei and SNM. We also show that when comparing to the standard, uncorrelated, Fermi-Gas model, the CFG model dramatically decreases the kinetic symmetry energy and discuss the implications of this change.