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Title: Two-Neutron Halo is Unveiled in F 29

Abstract

Here, we report the measurement of reaction cross sections ( σ R ex ) of F 27 , 29 with a carbon target at RIKEN. The unexpectedly large σ R ex and derived matter radius identify F 29 as the heaviest two-neutron Borromean halo to date. The halo is attributed to neutrons occupying the 2 p 3 / 2 orbital, thereby vanishing the shell closure associated with the neutron number N = 20 . The findings 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 F 27 but are challenged for F 29 .

Authors:
 [1];  [2];  [1];  [3];  [4];  [5];  [6];  [7];  [8];  [4];  [4];  [9];  [4];  [4];  [4];  [10];  [4];  [2];  [4];  [11] more »;  [12];  [13];  [14];  [15];  [16];  [8];  [17];  [18];  [13];  [19];  [20];  [13];  [21];  [9];  [3];  [8];  [4];  [20];  [20];  [4];  [4];  [22];  [4];  [18];  [23];  [8];  [4] « less
  1. Saint Mary’s Univ., Halifax, NS (Canada); GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany); Univ. of Giessen (Germany)
  2. Saint Mary’s Univ., Halifax, NS (Canada); TRIUMF, Vancouver, BC (Canada)
  3. GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany); Univ. of Giessen (Germany)
  4. RIKEN, Saitama (Japan)
  5. Hokkaido Univ., Sapporo (Japan)
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  7. Nihon Univ., Tokyo (Japan)
  8. Univ. of Tokyo (Japan)
  9. GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
  10. Central Michigan Univ., Mount Pleasant, MI (United States)
  11. RIKEN, Saitama (Japan); Tohoku Univ., Sendai (Japan). Dept. of Physics
  12. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  13. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  14. Saint Mary’s Univ., Halifax, NS (Canada); Dalhousie Univ., Halifax, NS (Canada)
  15. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  16. Kyoto Univ. (Japan)
  17. RIKEN, Saitama (Japan); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  18. Tokyo Institute of Technology (Japan)
  19. Osaka Univ. (Japan); Chinese Academy of Sciences (CAS), Lanzhou (China)
  20. RIKEN, Saitama (Japan); Univ. of Tokyo (Japan)
  21. Univ. of York (United Kingdom)
  22. Niigata Univ. (Japan)
  23. Univ. of Tokyo (Japan); Univ. of York (United Kingdom)
Publication Date:
Research Org.:
Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
Contributing Org.:
RIKEN Collaboration
OSTI Identifier:
1632004
Alternate Identifier(s):
OSTI ID: 1633145
Grant/Contract Number:  
FG02-96ER40963; AC05-00OR22725; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 124; Journal Issue: 22; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

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., Itahashi, K., Jansen, G. R., Jiang, W. G., Kaur, S., Macchiavelli, A. O., Matsumoto, S. Y., Momiyama, S., Murray, I., Nakamura, T., Novario, S. J., Ong, H. J., 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., and Yoshida, K. Two-Neutron Halo is Unveiled in F29. United States: N. p., 2020. Web. doi:10.1103/PhysRevLett.124.222504.
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., Itahashi, K., Jansen, G. R., Jiang, W. G., Kaur, S., Macchiavelli, A. O., Matsumoto, S. Y., Momiyama, S., Murray, I., Nakamura, T., Novario, S. J., Ong, H. J., 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. Two-Neutron Halo is Unveiled in F29. United States. doi:https://doi.org/10.1103/PhysRevLett.124.222504
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., Itahashi, K., Jansen, G. R., Jiang, W. G., Kaur, S., Macchiavelli, A. O., Matsumoto, S. Y., Momiyama, S., Murray, I., Nakamura, T., Novario, S. J., Ong, H. J., 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., and Yoshida, K. Fri . "Two-Neutron Halo is Unveiled in F29". United States. doi:https://doi.org/10.1103/PhysRevLett.124.222504.
@article{osti_1632004,
title = {Two-Neutron Halo is Unveiled in F29},
author = {Bagchi, S. and Kanungo, R. and Tanaka, Y. K. and Geissel, H. and Doornenbal, P. and Horiuchi, W. and Hagen, G. and Suzuki, T. and Tsunoda, N. and Ahn, D. S. and Baba, H. and Behr, K. and Browne, F. and Chen, S. and Cortés, M. L. and Estradé, A. and Fukuda, N. and Holl, M. and Itahashi, K. and Itahashi, K. and Jansen, G. R. and Jiang, W. G. and Kaur, S. and Macchiavelli, A. O. and Matsumoto, S. Y. and Momiyama, S. and Murray, I. and Nakamura, T. and Novario, S. J. and Ong, H. J. and Otsuka, T. and Papenbrock, T. and Paschalis, S. and Prochazka, A. and Scheidenberger, C. and Schrock, P. and Shimizu, Y. and Steppenbeck, D. and Sakurai, H. and Suzuki, D. and Suzuki, H. and Takechi, M. and Takeda, H. and Takeuchi, S. and Taniuchi, R. and Wimmer, K. and Yoshida, K.},
abstractNote = {Here, 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 findings 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.},
doi = {10.1103/PhysRevLett.124.222504},
journal = {Physical Review Letters},
number = 22,
volume = 124,
place = {United States},
year = {2020},
month = {6}
}

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