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. Iwasa; G. 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

doi:10.1103/PhysRevLett.124.222504

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

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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 language	English
Article number	222504
Journal	Physical Review Letters
Volume	124
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevLett.124.222504
State	Published - Jun 5 2020

Funding

The authors gratefully thank the RIKEN Rare Isotope Beam Factory for delivering the beam with unprecedented high intensity. The support from NSERC Canada is gratefully acknowledged. This work was also supported by JSPS KAKENHI Grants No. 16H02179, No. 18H05404, UK STFC under Contract No. ST/P003885/1, the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Contract No. DE-AC02-05CH11231 (LBNL). The work was supported in part by the Office of Nuclear Physics, U.S. Department of Energy, under Grants No. DE-SC0018223 (SciDAC-4 NUCLEI Collaboration), No. DE-FG02-96ER40963, and by the Field Work Proposal ERKBP72 at Oak Ridge National Laboratory (ORNL). Computer time was provided by the Innovative and Novel Computational Impact onTheory and Experiment (INCITE) program. This research used resources of the Oak Ridge Leadership Computing Facility and of the Compute and Data Environment for Science (CADES) located at ORNL, which is supported by the Office of Science of the Department of Energy under Contract No. DE-AC05-00OR22725. R.\u2009K. acknowledges the JSPS invitational fellowship program for short term research stay in Japan at the Tokyo Institute of Technology.

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Bagchi, S., Kanungo, R., Tanaka, Y. K., Geissel, H., Doornenbal, P., Horiuchi, W., Hagen, G., Suzuki, T., Tsunoda, N., Ahn, D. S., Baba, H., Behr, K., Browne, F., Chen, S., Cortés, M. L., Estradé, A., Fukuda, N., Holl, M., Itahashi, K., ... Yoshida, K. (2020). Two-Neutron Halo is Unveiled in F 29. Physical Review Letters, 124(22), Article 222504. https://doi.org/10.1103/PhysRevLett.124.222504

@article{a3ed42dbd5cc489fb70d541ac9d3534b,

title = "Two-Neutron Halo is Unveiled in F 29",

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.",

author = "S. Bagchi and R. Kanungo and Tanaka, {Y. K.} and H. Geissel and P. Doornenbal and W. Horiuchi and G. Hagen and T. Suzuki and N. Tsunoda and Ahn, {D. S.} and H. Baba and K. Behr and F. Browne and S. Chen and Cort{\'e}s, {M. L.} and A. Estrad{\'e} and N. Fukuda and M. Holl and K. Itahashi and N. Iwasa and Jansen, {G. R.} and Jiang, {W. G.} and S. Kaur and MacChiavelli, {A. O.} and Matsumoto, {S. Y.} and S. Momiyama and I. Murray and T. Nakamura and Novario, {S. J.} and Ong, {H. J.} and T. Otsuka and T. Papenbrock and S. Paschalis and A. Prochazka and C. Scheidenberger and P. Schrock and Y. Shimizu and D. Steppenbeck and H. Sakurai and D. Suzuki and H. Suzuki and M. Takechi and H. Takeda and S. Takeuchi and R. Taniuchi and K. Wimmer and K. Yoshida",

note = "Publisher Copyright: {\textcopyright} 2020 American Physical Society.",

year = "2020",

month = jun,

day = "5",

doi = "10.1103/PhysRevLett.124.222504",

language = "English",

volume = "124",

journal = "Physical Review Letters",

issn = "0031-9007",

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Bagchi, S, Kanungo, R, Tanaka, YK, Geissel, H, Doornenbal, P, Horiuchi, W, Hagen, G, Suzuki, T, Tsunoda, N, Ahn, DS, Baba, H, Behr, K, Browne, F, Chen, S, Cortés, ML, Estradé, A, Fukuda, N, Holl, M, Itahashi, K, Iwasa, N, Jansen, GR, Jiang, WG, Kaur, S, MacChiavelli, AO, Matsumoto, SY, Momiyama, S, Murray, I, Nakamura, T, Novario, SJ, Ong, HJ, Otsuka, T, Papenbrock, T, Paschalis, S, Prochazka, A, Scheidenberger, C, Schrock, P, Shimizu, Y, Steppenbeck, D, Sakurai, H, Suzuki, D, Suzuki, H, Takechi, M, Takeda, H, Takeuchi, S, Taniuchi, R, Wimmer, K & Yoshida, K 2020, 'Two-Neutron Halo is Unveiled in F 29', Physical Review Letters, vol. 124, no. 22, 222504. https://doi.org/10.1103/PhysRevLett.124.222504

TY - JOUR

T1 - Two-Neutron Halo is Unveiled in F 29

AU - Bagchi, S.

AU - Kanungo, R.

AU - Tanaka, Y. K.

AU - Geissel, H.

AU - Doornenbal, P.

AU - Horiuchi, W.

AU - Hagen, G.

AU - Suzuki, T.

AU - Tsunoda, N.

AU - Ahn, D. S.

AU - Baba, H.

AU - Behr, K.

AU - Browne, F.

AU - Chen, S.

AU - Cortés, M. L.

AU - Estradé, A.

AU - Fukuda, N.

AU - Holl, M.

AU - Itahashi, K.

AU - Iwasa, N.

AU - Jansen, G. R.

AU - Jiang, W. G.

AU - Kaur, S.

AU - MacChiavelli, A. O.

AU - Matsumoto, S. Y.

AU - Momiyama, S.

AU - Murray, I.

AU - Nakamura, T.

AU - Novario, S. J.

AU - Ong, H. J.

AU - Otsuka, T.

AU - Papenbrock, T.

AU - Paschalis, S.

AU - Prochazka, A.

AU - Scheidenberger, C.

AU - Schrock, P.

AU - Shimizu, Y.

AU - Steppenbeck, D.

AU - Sakurai, H.

AU - Suzuki, D.

AU - Suzuki, H.

AU - Takechi, M.

AU - Takeda, H.

AU - Takeuchi, S.

AU - Taniuchi, R.

AU - Wimmer, K.

AU - Yoshida, K.

PY - 2020/6/5

Y1 - 2020/6/5

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85086841156&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.124.222504

DO - 10.1103/PhysRevLett.124.222504

M3 - Article

C2 - 32567915

AN - SCOPUS:85086841156

SN - 0031-9007

VL - 124

JO - Physical Review Letters

JF - Physical Review Letters

IS - 22

M1 - 222504

ER -

Two-Neutron Halo is Unveiled in F 29

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