Investigation of the 3/22−state of9Li with microscopic structure and reaction models

Abstract

The low-lying states of the 9 Li nucleus are investigated with a unified framework of microscopic structure and reaction models. In the structure model, the wave function is fully antisymmetrized and the 9 Li nucleus is described as an α + t + n + n four-body system, and low-lying 1/2 − , 3/2 − , 5/2 − , and 7/2 − states are obtained by the stochastic multi-configuration mixing method. Using these wave functions, the quasi-elastic cross section at E/A = 60 MeV and the elastic and inelastic cross sections at E/A = 50 MeV on the 12 C target are calculated in the framework of the microscopic coupled channel (MCC) method. The characteristic inelastic angular distribution is seen in the 3/2 − 2 state, whose α+t cluster structure and valence neutron configurations are discussed in detail. We find the possibility of triaxial deformation and mixing of di-neutron components in the 9 Li nucleus.

Effects of a chiral three-nucleon force on nucleus-nucleus scattering

“…The difference may come from projectile and/or target excitations, since the previous work of Ref. [48] shows that the excitation effects slightly shift the diffraction pattern backward. The higher-order corrections mentioned above may be masked by the excitation effects.…”

Saturation of nuclear matter and roles of many-body forces: nuclear matter in neutron stars probed by nucleus—nucleus scattering

“…The CEG07 models were first successfully applied to the analysis of proton-nucleus elastic scattering over a wide range of incident energies and target nuclei [13] and later to the analyses of elastic scattering of nucleus-nucleus systems with great success [23,37,38,51]. It was also applied to the analyses of nucleus-nucleus inelastic scattering [52][53][54][55] with the microscopic coupled-channel formalism in which not only the diagonal potentials but also the coupling potentials that induce inelastic excitations of the colliding nuclei were obtained with the CEG07 G-matrix with the 3NF effects included. Fig.…”