Nuclear Dynamics and the Impact of 7Li Breakup and Triton Transfer in 7Li + 28Si Systems

Abstract Our previous study [A. H. Al-Ghamdi et al., JTUSCI 16 (2022) 1026] provided a comprehensive analysis of elastic scattering angular distributions (ADs) for the 7Li + 28Si system. This analysis aimed to identify the types of threshold anomaly, specifically normal or breakup, by examining the energy dependence of volume integrals across various interaction potentials. The current study extends this work by investigating the effects of 7Li breakup into a valence particle (triton) orbiting a core (alpha) in the context of a 28Si target, as well as the influence of the 28Si(7Li,α)31P triton transfer reaction on the elastic ADs of the 7Li + 28Si system. The results demonstrate the significance of coupling to the 7Li breakup channel and its subsequent impact on the elastic scattering channel. This strong coupling generates a dynamical polarization potential (DPP), leading to a reduction in potential strengths. A semi-microscopic DPP approach was utilized to model this effect, employing the continuum discretized coupled channels (CDCC) method. Furthermore, the analysis was broadened to assess the effect of the triton stripping reaction 28Si(7Li,α)31P on the elastic 7Li + 28Si scattering.