The spectroscopic quadrupole moment of the 2<SUP>+</SUP>₁ state of <SUP>12</SUP>C: A benchmark of theoretical models

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Saiz-Lomas, J, Petri, M, Lee, IY, Syndikus, I, Heil, S, Allmond, JM, Gaffney, LP ORCID: 0000-0002-2938-3696, Pakarinen, J, Badran, H, Calverley, T et al (show 21 more authors) , Cox, DM, Forsberg, U, Grahn, T, Greenlees, P, Hadynska-Klek, K, Hilton, J, Jenkinson, M, Julin, R, Konki, J, Macchiavelli, AO, Mathy, M, Ojala, J ORCID: 0000-0002-3889-5837, Papadakis, P ORCID: 0000-0001-7509-4257, Partanen, J, Rahkila, P, Ruotsalainen, P, Sandzelius, M, Saren, J, Stolze, S, Uusitalo, J and Wadsworth, R (2023) The spectroscopic quadrupole moment of the 2<SUP>+</SUP>₁ state of <SUP>12</SUP>C: A benchmark of theoretical models. PHYSICS LETTERS B, 845. p. 138114.

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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(21+)=+9.3−3.8+3.5efm2 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(21+)=+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.

Item Type:	Article
Divisions:	Faculty of Science and Engineering > School of Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	05 Mar 2024 08:50
Last Modified:	05 Mar 2024 08:51
DOI:	10.1016/j.physletb.2023.138114
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3179108