Kaneko, K., Sun, Y., Mizusaki, T. et al. (3 more authors) (2019) Large mirror asymmetry in Gamow-Teller β-decay in the A = 26 isobaric multiplet. Nuclear Physics A. pp. 107-115. ISSN 0375-9474
Abstract
We investigate a striking example of mirror asymmetry in Gamow-Teller (GT) β-decay using the nuclear shell-model including isospin-nonconserving (INC) forces in the sd-shell region. We show that the large mirror asymmetry between 26 P and 26 Na GT β-decay can be accurately reproduced by introducing T=1, J≠0 INC forces related to the s 1/2 orbit, while the usual J=0 INC force, commonly adopted to describe isospin-symmetry breaking, does not work. We further show that the calculated distribution of summed GT strength for the 26 P β-decay is in good agreement with the experimental data. Our results support the conclusion that 26 P is a nucleus with proton-halo structure.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 Published by Elsevier B.V. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. |
Keywords: | Gamow-Teller β-decay,Isospin-nonconserving forces,Large-scale shell model,Mirror asymmetry,Proton halos |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > York Institute for Materials Research The University of York > Faculty of Sciences (York) > Physics (York) |
Funding Information: | Funder Grant number SCIENCE AND TECHNOLOGY FACILITIES COUNCIL (STFC) ST/P003885/1 |
Depositing User: | Pure (York) |
Date Deposited: | 17 Jun 2019 14:50 |
Last Modified: | 16 Oct 2024 15:45 |
Published Version: | https://doi.org/10.1016/j.nuclphysa.2019.03.002 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1016/j.nuclphysa.2019.03.002 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:147407 |