Bagchi, S., Kanungo, R., Tanaka, Y. K. et al. (44 more authors) (2020) Two-Neutron Halo is Unveiled in ^{29}F. Physical Review Letters. 222504. ISSN 1079-7114
Abstract
We report the measurement of reaction cross sections (σ_{R}^{ex}) of ^{27,29}F with a carbon target at RIKEN. The unexpectedly large σ_{R}^{ex} and derived matter radius identify ^{29}F as the heaviest two-neutron Borromean halo to date. The halo is attributed to neutrons occupying the 2p_{3/2} 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 ^{27}F but are challenged for ^{29}F.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 American Physical Society. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Health Sciences (York) The University of York > Faculty of Arts and Humanities (York) > Philosophy (York) The University of York > Faculty of Sciences (York) > Biology (York) The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 21 Jul 2020 16:00 |
Last Modified: | 18 Dec 2024 00:16 |
Published Version: | https://doi.org/10.1103/PhysRevLett.124.222504 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1103/PhysRevLett.124.222504 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:163580 |