Dowie, J. T.H., Kibédi, T., Jenkins, D. G. orcid.org/0000-0001-9895-3341 et al. (21 more authors) (2020) Evidence for shape coexistence and superdeformation in 24Mg. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 135855. ISSN 0370-2693
Abstract
The E0 transition depopulating the first-excited 0+ state in 24Mg has been observed for the first time, and the E0 transition strength determined by electron-positron pair and γ-ray spectroscopy measurements performed using the Super-e pair spectrometer. The E0 transition strength is ρ2×103=380(70). A two-state mixing model implies a deformation of the first-excited 0+ state of β2≈1 and a change in the mean-square charge radius of Δ〈r2〉≈1.9fm2, which suggests a significant shape change between the ground state and first-excited 0+ state in 24Mg. The observed E0 strength gives direct evidence of shape coexistence and superdeformation in 24Mg, bringing this nucleus into line with similar behaviour in nearby N=Z nuclei. This result agrees with recent theoretical work on the cluster nature of 24Mg and has potential ramifications for nuclear reactions of astrophysical importance.
Metadata
Authors/Creators: |
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Copyright, Publisher and Additional Information: | 2020 The Author(s). Published by Elsevier B.V. | ||||
Keywords: | Electric monopole (E0) transitions, Electron-positron pair spectroscopy, Nuclear structure, Shape coexistence, Superdeformation, γ-Ray spectroscopy | ||||
Dates: |
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Institution: | The University of York | ||||
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) The University of York > York Institute for Materials Research The University of York > Faculty of Sciences (York) > Biology (York) |
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Funding Information: |
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Depositing User: | Pure (York) | ||||
Date Deposited: | 30 Oct 2020 12:00 | ||||
Last Modified: | 06 Dec 2023 13:57 | ||||
Published Version: | https://doi.org/10.1016/j.physletb.2020.135855 | ||||
Status: | Published | ||||
Refereed: | Yes | ||||
Identification Number: | https://doi.org/10.1016/j.physletb.2020.135855 | ||||
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