Short-range correlations in dynamical intranuclear cascade models for describing single-nucleon knockout and quasi-free (p,2p) fission reactions

Abstract

The dynamical intranuclear cascade model INCL has been improved by including short-range nucleon-nucleon correlations (SRCs), which are mainly dominated by the formation of np pairs. This new development allows us to obtain a better description of peripheral collisions involving the knockout of a few nucleons in spallation and fragmentation reactions when INCL is coupled to de-excitation model ABLA. The new version of our dynamical model successfully describes inclusive single-neutron and single-proton knockout cross sections for various stable and exotic nuclei. The results show that the systematic strong dependence of the single-knockout cross section reduction factor on the neutron-proton separation energy asymmetry parameter obtained by Tostevin and Gade disappears when SRCs are taken into account. INCL+ABLA are also used to study the evolution of the quasi-free (p,2p)-fission cross section with the neutron excess or mass number (A) for exotic heavy nuclei.