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

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number222504
JournalPhysical review letters
Volume124
Issue number22
DOIs
Publication statusPublished - 2020 Jun 5

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint

Dive into the research topics of 'Two-Neutron Halo is Unveiled in F 29'. Together they form a unique fingerprint.

Cite this