Breakup of the proton halo nucleus 8B near barrier energies

L. Yang, C. J. Lin (), H. Yamaguchi, A. M. Moro (), N. R. Ma, D. X. Wang, K. J. Cook, M. Mazzocco, P. W. Wen, S. Hayakawa, J. S. Wang, Y. Y. Yang, G. L. Zhang, Z. Huang, A. Inoue, H. M. Jia, D. Kahl, A. Kim, M. S. Kwag, M. La Commara, G. M. Gu, S. Okamoto, C. Parascandolo, D. Pierroutsakou, H. Shimizu, H. H. Sun, M. L. Wang, F. Yang and F. P. Zhong
Additional contact information
L. Yang: China Institute of Atomic Energy
C. J. Lin: China Institute of Atomic Energy
H. Yamaguchi: University of Tokyo
A. M. Moro: Universidad de Sevilla
N. R. Ma: China Institute of Atomic Energy
D. X. Wang: China Institute of Atomic Energy
K. J. Cook: Tokyo Institute of Technology
M. Mazzocco: Universita di Padova
P. W. Wen: China Institute of Atomic Energy
S. Hayakawa: University of Tokyo
J. S. Wang: Huzhou University
Y. Y. Yang: Institute of Modern Physics, Chinese Academy of Sciences
G. L. Zhang: Beihang University
Z. Huang: Beihang University
A. Inoue: Osaka University
H. M. Jia: China Institute of Atomic Energy
D. Kahl: Extreme Light Infrastructure – Nuclear Physics, Horia Hulubei National Institute for R& D in Physics and Nuclear Engineering (IFIN-HH)
A. Kim: Korea University
M. S. Kwag: Sungkyunkwan University
M. La Commara: University Federico II
G. M. Gu: Sungkyunkwan University
S. Okamoto: Kyoto University
C. Parascandolo: Istituto Nazionale di Fisica Nucleare-Sezione di Napoli
D. Pierroutsakou: Istituto Nazionale di Fisica Nucleare-Sezione di Napoli
H. Shimizu: University of Tokyo
H. H. Sun: China Institute of Atomic Energy
M. L. Wang: Beihang University
F. Yang: China Institute of Atomic Energy
F. P. Zhong: China Institute of Atomic Energy

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: Abstract The dynamics of a nuclear open quantum system could be revealed in the correlations between the breakup fragments of halo nuclei. The breakup mechanism of a proton halo nuclear system is of particular interest as the Coulomb polarization may play an important role, which, however, remains an open question. Here we use a highly efficient silicon detector array and measure the correlations between the breakup fragments of 8B incident on 120Sn at near-barrier energies. The energy and angular correlations can be explained by a fully quantum mechanical method based on the state-of-the-art continuum discretized coupled channel calculations. The results indicate that, compared to the neutron halo nucleus 6He, 8B presents distinctive reaction dynamics: the dominance of the elastic breakup. This breakup occurs mainly via the short-lived continuum states, almost exhausts the 7Be yield, indicating the effect of Coulomb polarization on the proton halo state. The correlation information reveals that the prompt breakup mechanism dominates, occurring predominantly on the outgoing trajectory. We also show that, as a large environment, the continuum of 8B breakup may not significantly influence elastic scattering and complete fusion.

Date: 2022
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DOI: 10.1038/s41467-022-34767-8

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