Two-Neutron Halo is Unveiled in F 29

S. Bagchi, R. Kanungo, Y. K. Tanaka, H. Geissel, P. Doornenbal, W. Horiuchi, G. Hagen, T. Suzuki, N. Tsunoda, D. S. Ahn, H. Baba, K. Behr, F. Browne, S. Chen, M. L. Cortés, A. Estradé, N. Fukuda, M. Holl, K. Itahashi, N. IwasaG. R. Jansen, W. G. Jiang, S. Kaur, A. O. MacChiavelli, S. Y. Matsumoto, S. Momiyama, I. Murray, T. Nakamura, S. J. Novario, H. J. Ong, T. Otsuka, T. Papenbrock, S. Paschalis, A. Prochazka, C. Scheidenberger, P. Schrock, Y. Shimizu, D. Steppenbeck, H. Sakurai, D. Suzuki, H. Suzuki, M. Takechi, H. Takeda, S. Takeuchi, R. Taniuchi, K. Wimmer, K. Yoshida

研究成果: Article査読

9 被引用数 (Scopus)

抄録

We report the measurement of reaction cross sections (σRex) of F27,29 with a carbon target at RIKEN. The unexpectedly large σRex and derived matter radius identify F29 as the heaviest two-neutron Borromean halo to date. The halo is attributed to neutrons occupying the 2p3/2 orbital, thereby vanishing the shell closure associated with the neutron number N=20. The results are explained by state-of-the-art shell model calculations. Coupled-cluster computations based on effective field theories of the strong nuclear force describe the matter radius of F27 but are challenged for F29.

本文言語English
論文番号222504
ジャーナルPhysical review letters
124
22
DOI
出版ステータスPublished - 2020 6 5

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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