A1 Journal article (refereed)
Reassigning the shapes of the 0+ states in the 186Pb nucleus (2022)
Ojala, J., Pakarinen, J., Papadakis, P., Sorri, J., Sandzelius, M., Cox, D. M., Auranen, K., Badran, H., Davies, P. J., Grahn, T., Greenlees, P. T., Henderson, J., Herzáň, A., Herzberg, R.-D., Hilton, J., Jakobsson, U., Jenkins, D. G., Joss, D. T., Julin, R., . . . Wadsworth, R. (2022). Reassigning the shapes of the 0+ states in the 186Pb nucleus. Communications physics, 5, Article 213. https://doi.org/10.1038/s42005-022-00990-4
JYU authors or editors
Publication details
All authors or editors: Ojala, Joonas; Pakarinen, Janne; Papadakis, Philippos; Sorri, Juha; Sandzelius, Mikael; Cox, Daniel M.; Auranen, Kalle; Badran, Hussam; Davies, Paul J.; Grahn, Tuomas; et al.
Journal or series: Communications physics
eISSN: 2399-3650
Publication year: 2022
Publication date: 18/08/2022
Volume: 5
Article number: 213
Publisher: Springer Science and Business Media LLC
Publication country: United Kingdom
Publication language: English
DOI: https://doi.org/10.1038/s42005-022-00990-4
Research data link: https://doi.org/10.23729/a6444894-5fe7-4683-a9d5-a8ff1e28208b
Publication open access: Openly available
Publication channel open access: Open Access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/82751
Abstract
Across the physics disciplines, the 186Pb nucleus is the only known system, where the two first excited states, together with the ground state, form a triplet of zero-spin states assigned with prolate, oblate and spherical shapes. Here we report on a precision measurement where the properties of collective transitions in 186Pb were determined in a simultaneous in-beam γ-ray and electron spectroscopy experiment employing the recoil-decay tagging technique. The feeding of the 0+2 state and the interband 2+2→2+1 transition have been observed. We also present direct measurement of the energies of the electric monopole transitions from the excited 0+ states to the 0+ ground state. In contrast to the earlier understanding, the obtained reduced transition probability B(E2;2+1→0+2) value of 190(80) W.u., the transitional quadrupole moment |Qt(2+1→0+2)|=7.7(33) eb and intensity balance arguments provide evidence to reassign the 0+2 and 0+3 states with predominantly prolate and oblate shape, respectively. Our work demonstrates a step-up in experimental sensitivity and paves the way for systematic studies of electric monopole transitions in this region. These electric monopole transitions probe the nuclear volume in a unique manner and provide unexploited input for development of the next-generation energy density functional models.
Keywords: nuclear physics; particle physics; lead
Free keywords: experimental nuclear physics; physics
Contributing organizations
Related projects
- Muotojen rinnakkaiselo ja kollektiivisuus raskaissa ytimissä
- Pakarinen, Janne
- Research Council of Finland
Ministry reporting: Yes
Reporting Year: 2022
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