Processes involving few degrees of freedom in the frame of Intranuclear Cascade approaches

Abstract

Abstract. This article focuses on spallation reactions, i.e. interactions of energetic nucleons, basically with a kinetic energy in the 100 MeV to a few GeV range, with a target nucleus. These processes are described rather successfully by the so-called Intranuclear Cascade (INC) plus evaporation models. They can be viewed as a first stage of nucleon-nucleon collisions, ejecting fast particles, followed by evaporation of slow particles from the target remnant. These cascade + evaporation models have, now, globally reached a high level of predictive power, owing in particular to successive research programs. The present work, which is an outcome of one of these programs, the recent European Union ANDES research program, deals with a set of reactions (or observable quantities), which can be due to a single collision, such as the one-nucleon removal reactions or the quasi-elastic elastic process. A survey of the experimental data is presented, which allows to clearly point out that, often, the INC models are unsatisfactory for the description of these peculiar events, whereas they are rather successful for the rest of the experimental data. This paradoxical situation is tentatively related to quasi-particle effects which are neglected in INC models.

Recent highlights from GENIE v3

“…With version 3.0, the hN (full cascade very similar to NuWro and NEUT) was added. With v3.2, we add the INCL++ [3,80] and Geant4 extended Bertini [4] models. These are added as libraries with appropriate interfaces.…”

“…The original hA model tracks particles in the same way as hN except that it does not have pion medium corrections. INCL [3,80] and Geant4 [4] use a series of shells at different radius, each having a custom depth. Therefore, both naturally include medium and binding energy corrections in a basic way.…”

Recent highlights from GENIE v3

“…With version 3.0, the hN (full cascade very similar to NuWro and NEUT) was added. With v3.2, we add the INCL++ [3,74] and Geant4 extended Bertini [4] models. These are added as libraries with appropriate interfaces.…”

“…The original hA model tracks particles in the same way as hN except that it doesn't have pion medium corrections. INCL [3,74] and Geant4 [4] use a series of shells at different radius, each having a custom depth. Therefore, both naturally include medium and binding energy corrections in a basic way.…”

Isotopic production cross sections of residual nuclei in the spallation reactionXe136(200AMeV)+pParadela1, Tassan‐Got2, Benlliure3 et al. 2017Phys. Rev. CSelf Cite160160View full textAdd to dashboardCite

“…In addition, an incomplete description of the proton and neutron abundances at the nucleus surface may play a relevant role. In this context, some efforts have recently been made using INCL [42,59], with the most relevant aspects being the neutron skin effects and the correlation between the energy of the nucleon orbitals and their radius.…”