Suppression of the elastic scattering cross section for 17Ne + 208Pb system

TL;DR

This study investigates the suppression of elastic scattering in the 17Ne + 208Pb system, revealing nuclear interactions as the main cause, with implications for understanding reactions involving proton-rich nuclei.

Contribution

It provides the first detailed analysis showing nuclear interactions suppress elastic scattering in proton-rich nuclei, contrasting with neutron-rich cases, using combined optical model and coupled channel approaches.

Findings

Nuclear interaction causes elastic scattering suppression.

Coulomb excitation effects are relatively small.

Direct reactions account for nearly half of total reactions.

Abstract

We investigated the elastic scattering, inelastic scattering, breakup reaction, and total fusion reactions of 17Ne + 208Pb system using the optical model (OM) and a coupled channel (CC) approaches. The aim of this study is to elucidate the suppress of the elastic cross-section that is invisible in proton-rich nuclei such as 8B and 17F projectiles but appears in neutron-rich nuclei such as 11Li and 11Be projectiles. The results revealed that this suppression was caused mainly by the nuclear interaction between the projectile and target nucleus rather than the strong Coulomb interaction observed in neutron-rich nuclei and the contributions of Coulomb excitation interaction due to two low-lying E2 resonance states are relatively small. From the simultaneous chi-square analysis of the 17Ne + 208Pb system, we can infer a strong suppression effect in the elastic scattering cross-section due to the nuclear interaction between the projectile and target nucleus, rather than the Coulomb interaction as observed in neutron-rich nuclei. Also, the contribution of the direct reaction, comprising the inelastic scattering and breakup reaction cross-sections, accounted for almost half of the total reaction. Finally, we perform the CC calculation using the parameters obtained from our OM calculation but our CC calculations could not explain the 15O production cross section.