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
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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) |
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Funding Information: |
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Depositing User: | Pure (York) | ||||
Date Deposited: | 17 Jun 2019 14:50 | ||||
Last Modified: | 06 Dec 2023 13:09 | ||||
Published Version: | https://doi.org/10.1016/j.nuclphysa.2019.03.002 | ||||
Status: | Published | ||||
Refereed: | Yes | ||||
Identification Number: | https://doi.org/10.1016/j.nuclphysa.2019.03.002 | ||||
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