Microscopic description of ${}^7$Li in the ${}^7\text{Li}{+}^{12}\text{C}$ and ${}^7\text{Li}{+}^{28}\text{Si}$ elastic scattering at high energies

Abstract

We employ a microscopic continuum-discretized coupled-channels reaction framework (MCDCC) to study the elastic angular distribution of the ${}^7$Li$=\alpha +t$ nucleus colliding with ${}^{12}$C and ${}^{28}$Si targets at $E_{\text{Lab}}$=350 MeV. In this framework, the ${}^7$Li projectile is described in a microscopic cluster model and impinges on non-composite targets. The diagonal and coupling potentials are constructed from nucleon-target interactions and ${}^7$Li microscopic wave functions. We obtain a fair description of the experimental data, in the whole angular range studied, when continuum channels are included. The inelastic and breakup angular distributions on the lightest target are also investigated. In addition, we compute ${}^7$Li${+}^{12}$C MCDCC elastic cross sections at energies much higher than the Coulomb barrier and we use them as reference calculations to test the validity of multichannel eikonal cross sections.

Comments: 9 Pages, 6 Figures