https://doi.org/10.1140/epja/s10050-024-01354-y
Regular Article - Theoretical Physics
Microscopic study of low-lying energy levels and electromagnetic properties in even–even 
Yb nuclei
1
Facultad de Física, Universidad Veracruzana, Paseo No. 112, Desarrollo Hab. Nvo. Xalapa, 91097, Xalapa, Veracruz, Mexico
2
Facultad de Ciencias, Universidad Nacional Autónoma de México, Apartado Postal 70-542, 04510, Mexico City, México
Received:
23
January
2024
Accepted:
1
June
2024
Published online:
25
June
2024
Employing methods based on symmetries for the theoretical description of rare-earth nuclei offers many advantages. Among these, the pseudo-SU(3) shell model has proved to be a very useful method to describe characteristics of these systems and to understand various properties. A theoretical description of the low-lying energy spectrum and electromagnetic properties of isotopes Yb is carried out for the first time with this model, comparing theoretical results with the experimental values, where possible. The Hamiltonian includes the 
term which preserves the symmetry, as well as the breaking symmetry of Nilsson and pairing terms. Additionally, three rotor type terms are included that allow us to make a subtle adjustment of the spectrum. The results show that the energy spectrum, the B(E2) transitions, the g-factors and the electric quadrupole moments can be described adequately with the model. Although the model is a powerful tool in the description of low-lying properties of normal parity in heavy deformed nuclei, it finds its strongest limitation in the abnormal parity sector, which has been left out of the description.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
