https://doi.org/10.1140/epja/s10050-025-01598-2
Review
Experimental investigations on near-barrier reactions with weakly-bound nuclei at the China Institute of Atomic Energy
China Institute of Atomic Energy, P. O. Box 275(10), 102413, Beijing, China
a
yang_lei@ciae.ac.cn
b
cjlin@ciae.ac.cn
Received:
6
February
2025
Accepted:
12
May
2025
Published online:
28
May
2025
Reaction dynamics of weakly-bound nuclear systems at energies near the Coulomb barrier represent one of the most intriguing topics in the field of nuclear physics. This review examines the experimental efforts devoted to studying reactions involving weakly-bound nuclei by the Nuclear Reaction Group at the China Institute of Atomic Energy over the past decades. These efforts primarily focus on the interaction potentials and reaction mechanisms of weakly-bound nuclei. To extract optical model potentials at near- and particularly sub-barrier energies, a novel transfer reaction method was developed and applied to exotic nuclear systems. An abnormal threshold anomaly and the inapplicability of the dispersion relation were found in the neutron-halo system 6He+209Bi. To elucidate this anomalous behavior, the notch approach was employed to investigate the radial sensitivity of optical potentials, and the Bayesian method was further applied to constrain the uncertainties of extracted potential parameters. Barrier distributions for the weakly-bound nuclear system with 6,7Li and 9Be were extracted by measuring quasi-elastic excitation functions with high precision at backward angles, revealing a pronounced effect of breakups. Based on detector arrays with a large solid-angle coverage, the complete kinematics measurement method was further developed to study the reaction dynamics of weakly-bound nuclear systems. Results of weakly-bound stable nuclei 6,7Li demonstrate a diversity in breakup modes. For unstable nuclei, proton drip-line systems of 17F and 8B were intensively studied. Compared with their neutron-halo counterparts, proton-rich nuclear systems exhibit distinct reaction mechanisms. In this review, we integrate our own research endeavors with corresponding data from literatures to conduct a comprehensive analysis and delve into the underlying physical mechanisms, thereby offering novel insights and a deeper understanding of the reactions induced by weakly-bound nuclei at near-barrier energies.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
