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
Item Type: | Article |
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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) |
Funding Information: | Funder Grant number SCIENCE AND TECHNOLOGY FACILITIES COUNCIL (STFC) ST/P003885/1 |
Depositing User: | Pure (York) |
Date Deposited: | 30 Oct 2020 12:00 |
Last Modified: | 16 Oct 2024 17:03 |
Published Version: | https://doi.org/10.1016/j.physletb.2020.135855 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1016/j.physletb.2020.135855 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:167445 |
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