The spectroscopic quadrupole moment of the 21+ state of 12C: A benchmark of theoretical models

J. Saiz-Lomas; M. Petri; I. Y. Lee; I. Syndikus; S. Heil; J. M. Allmond; L. P. Gaffney; J. Pakarinen; H. Badran; T. Calverley; D. M. Cox; U. Forsberg; T. Grahn; P. Greenlees; K. Hadyńska-Klȩk; J. Hilton; M. Jenkinson; R. Julin; J. Konki; A. O. Macchiavelli; M. Mathy; J. Ojala; P. Papadakis; J. Partanen; P. Rahkila; P. Ruotsalainen; M. Sandzelius; J. Sarén; S. Stolze; J. Uusitalo; R. Wadsworth

doi:10.1016/j.physletb.2023.138114

The spectroscopic quadrupole moment of the 2₁⁺ state of ¹²C: A benchmark of theoretical models

J. Saiz-Lomas, M. Petri^*, I. Y. Lee, I. Syndikus, S. Heil, J. M. Allmond, L. P. Gaffney, J. Pakarinen, H. Badran, T. Calverley, D. M. Cox, U. Forsberg, T. Grahn, P. Greenlees, K. Hadyńska-Klȩk, J. Hilton, M. Jenkinson, R. Julin, J. Konki, A. O. MacchiavelliM. Mathy, J. Ojala, P. Papadakis, J. Partanen, P. Rahkila, P. Ruotsalainen, M. Sandzelius, J. Sarén, S. Stolze, J. Uusitalo, R. Wadsworth

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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 Q_s(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 Q_s(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.

Original language	English
Article number	138114
Number of pages	6
Journal	Physics Letters B
Volume	845
Early online date	8 Aug 2023
DOIs	https://doi.org/10.1016/j.physletb.2023.138114
Publication status	Published - 10 Oct 2023

Bibliographical note

© 2023 The Author(s). Published by Elsevier B.V.

Funding Information:
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 66 Ga 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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© 2023 The Author(s). Published by Elsevier B.V.
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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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title = "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(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.",

author = "J. Saiz-Lomas and M. Petri and Lee, {I. Y.} and I. Syndikus and S. Heil and Allmond, {J. M.} and Gaffney, {L. P.} and J. Pakarinen and H. Badran and T. Calverley and Cox, {D. M.} and U. Forsberg and T. Grahn and P. Greenlees and K. Hady{\'n}ska-Klȩk and J. Hilton and M. Jenkinson and R. Julin and J. Konki and Macchiavelli, {A. O.} and M. Mathy and J. Ojala and P. Papadakis and J. Partanen and P. Rahkila and P. Ruotsalainen and M. Sandzelius and J. Sar{\'e}n and S. Stolze and J. Uusitalo and R. Wadsworth",

note = "{\textcopyright} 2023 The Author(s). Published by Elsevier B.V. Funding Information: 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 66 Ga 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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doi = "10.1016/j.physletb.2023.138114",

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Saiz-Lomas, J, Petri, M, Lee, IY, Syndikus, I , Heil, S, Allmond, JM, Gaffney, LP, Pakarinen, J, Badran, H, Calverley, T, Cox, DM, Forsberg, U, Grahn, T, Greenlees, P, Hadyńska-Klȩk, K, Hilton, J, Jenkinson, M, Julin, R, Konki, J, Macchiavelli, AO, Mathy, M, Ojala, J, Papadakis, P, Partanen, J, Rahkila, P, Ruotsalainen, P, Sandzelius, M, Sarén, J, Stolze, S, Uusitalo, J & Wadsworth, R 2023, 'The spectroscopic quadrupole moment of the 2₁⁺ state of ¹²C: A benchmark of theoretical models', Physics Letters B, vol. 845, 138114. https://doi.org/10.1016/j.physletb.2023.138114

TY - JOUR

T1 - The spectroscopic quadrupole moment of the 21+ state of 12C

T2 - A benchmark of theoretical models

AU - Saiz-Lomas, J.

AU - Petri, M.

AU - Lee, I. Y.

AU - Syndikus, I.

AU - Heil, S.

AU - Allmond, J. M.

AU - Gaffney, L. P.

AU - Pakarinen, J.

AU - Badran, H.

AU - Calverley, T.

AU - Cox, D. M.

AU - Forsberg, U.

AU - Grahn, T.

AU - Greenlees, P.

AU - Hadyńska-Klȩk, K.

AU - Hilton, J.

AU - Jenkinson, M.

AU - Julin, R.

AU - Konki, J.

AU - Macchiavelli, A. O.

AU - Mathy, M.

AU - Ojala, J.

AU - Papadakis, P.

AU - Partanen, J.

AU - Rahkila, P.

AU - Ruotsalainen, P.

AU - Sandzelius, M.

AU - Sarén, J.

AU - Stolze, S.

AU - Uusitalo, J.

AU - Wadsworth, R.

N1 - © 2023 The Author(s). Published by Elsevier B.V. Funding Information: 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 66 Ga 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.

PY - 2023/10/10

Y1 - 2023/10/10

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85169048695&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2023.138114

DO - 10.1016/j.physletb.2023.138114

M3 - Article

AN - SCOPUS:85169048695

SN - 0370-2693

VL - 845

JO - Physics Letters B

JF - Physics Letters B

M1 - 138114

ER -

The spectroscopic quadrupole moment of the 2₁⁺ state of ¹²C: A benchmark of theoretical models

Abstract

Bibliographical note

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Nuclear Physics Consolidated Grant 2021-2024

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The spectroscopic quadrupole moment of the 21+ state of 12C: A benchmark of theoretical models

Abstract

Bibliographical note

Access to Document

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Nuclear Physics Consolidated Grant 2021-2024

Nuclear Physics Consolidated Grant

Cite this

The spectroscopic quadrupole moment of the 2₁⁺ state of ¹²C: A benchmark of theoretical models