Reaction dynamics of proton drip-line nuclei at energies around the Coulomb barrier

¹ China Institute of Atomic Energy, PO Box 275 (10), Beijing 102413, China
² Center for Nuclear Study, University of Tokyo, RIKEN campus, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan

^* e-mail: yang_lei@ciae.ac.cn
^** e-mail: cjlin@ciae.ac.cn

Published online: 18 October 2024

Abstract

This work briefly introduces our recent studies on reactions induced by proton drip-line nuclei, ⁸B and ¹⁷F, at energies around the Coulomb barrier. Using detector arrays with large solid-angle coverage, the complete kinematics measurements were performed for systems of ⁸B+¹²⁰Sn and ¹⁷F+⁵⁸Ni. For the ⁸B+¹²⁰Sn, the coincident measurement of the breakup fragments was achieved for the first time for a proton-halo nuclear system. The correlations between the breakup fragments reveal that the prompt breakup occurring on the outgoing trajectory dominates the breakup dynamics of ⁸B. For ¹⁷F+⁵⁸Ni, the complete reaction channel information, such as quasi-elastic scattering, breakup and total fusion, was derived for the first time. An enhancement of the fusion cross section of ¹⁷F+⁵⁸Ni was observed at the energy below the Coulomb barrier. Theoretical calculations indicate that this phenomenon is mainly due to the couplings to the continuum states. Moreover, different direct reaction dynamics were found in ⁸B and ¹⁷F systems, suggesting the influence of proton-halo structure on the reaction dynamics.