The spectroscopic quadrupole moment of the 21+ state of 12C : A benchmark of theoretical models
Abstract
The spectroscopic quadrupole moment of the first 2+ state of 12C has been measured employing the Coulomb-excitation re-orientation technique. Our result of Qs (2+ 1 ) = +9.3+3.5 −3.8 efm2 suggests a larger oblate deformation than previously reported. Combining this with the consistently re-analyzed adopted value, we present the most precise value to date of Qs(2+ 1 ) = +9.5(18) efm2, which is consistent with a geometrical rotor description. This simple outcome is compared to state-of-the-art shell-model, mean field, ab initio calculations, cluster-based and geometrical-like theories, which show varying degrees of emergent quadrupole collectivity.
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Format
Articles
Research article
Published
2023
Series
Subjects
Publication in research information system
Publisher
Elsevier
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-202309085035Use this for linking
Review status
Peer reviewed
ISSN
0370-2693
DOI
https://doi.org/10.1016/j.physletb.2023.138114
Language
English
Published in
Physics Letters B
Citation
- Saiz-Lomas, J., Petri, M., Lee, I. Y., Syndikus, I., Heil, S., Allmond, J. M., Gaffney, L. P., Pakarinen, J., Badran, H., Calverley, T., Cox, D. M., Forsberg, U., Grahn, T., Greenlees, P., Hadyńska-Klȩk, K., Hilton, J., Jenkinson, M., Julin, R., Konki, J., . . . Wadsworth, R. (2023). The spectroscopic quadrupole moment of the 21+ state of 12C : A benchmark of theoretical models. Physics Letters B, 845, Article 138114. https://doi.org/10.1016/j.physletb.2023.138114
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The authors acknowledge C. Bertulani, A. Vitturi, A. Moro, M. Gomez, J. M. Quesada, M. Zielinska, and C. Barton for enlightening discussions, and I. Moore for proposing and supporting the production of the 66Ga source. This work was supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – Projektnummer 279384907 – SFB 1245, the Royal Society under contract number UF150476, the UK STFC under grant numbers ST/L005727/1, ST/P003885/1, the UK STFC ERF fellowship ST/R004056/1, and by the Director, Office of Science, Office of Nuclear Physics, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 (LBNL). This project has received funding from the EU HORIZON2020 programme “Infrastructures”, project number 654002 (ENSAR2). U. Forsberg would like to thank Birgit and Hellmuth Hertz' Foundation for financial support.
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