University of Oulu

Lv, B. F., Petrache, C. M., Lawrie, E. A., Guo, S., Astier, A., Zheng, K. K., Ong, H. J., Wang, J. G., Zhou, X. H., Sun, Z. Y., Greenlees, P. T., Badran, H., Calverley, T., Cox, D. M., Grahn, T., Hilton, J., Julin, R., Juutinen, S., Konki, J., … Andreoiu, C. (2022). Evidence against the wobbling nature of low-spin bands in 135Pr. Physics Letters B, 824, 136840.

Evidence against the wobbling nature of low-spin bands in 135Pr

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Author: Lv, B. F.1,2,3; Petrache, C. M.3; Lawrie, E. A.4,5;
Organizations: 1Chinese Acad Sci, Inst Modern Phys, Key Lab High Precis Nucl Spect, Lanzhou 730000, Peoples R China.
2Chinese Acad Sci, Ctr Nucl Matter Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China.
3Univ Paris Saclay, IJCLab, CNRS IN2P3, F-91405 Orsay, France.
4Natl Res Fdn, iThemba Labs, POB 722, ZA-7129 Somerset West, South Africa.
5Univ Western Cape, Dept Phys, Private Bag X17, ZA-7535 Bellville, South Africa.
6Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China.
7Univ Jyvaskyla, Dept Phys, POB 35, FI-40014 Jyvaskyla, Finland.
8Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.
9Lund Inst Technol, Dept Math Phys, S-22362 Lund, Sweden.
10CERN, CH-1211 Geneva 23, Switzerland.
11University of Jyväskylä, Department of Physics, P.O. Box 35, FI-40014, University of Jyväskylä, Finland
12Sodankylä Geophysical Observatory, University of Oulu, FIN-99600 Sodankylä, Finland
13Argonne Natl Lab, Phys Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
14KTH Dept Phys, S-10691 Stockholm, Sweden.
15Inst Nucl Res Atomki ELKH, H-4001 Debrecen, Hungary.
16Univ Warsaw, Heavy Ion Lab, Pasteura 5a, PL-02093 Warsaw, Poland.
17Simon Fraser Univ, Dept Chem, Burnaby, BC V5A 1S6, Canada.
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.5 MB)
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Language: English
Published: Elsevier, 2022
Publish Date: 2022-08-18


The electromagnetic character of the ΔI = 1 transitions connecting the 1- to 0-phonon and the 2- to 1-phonon wobbling bands should be dominated by an E2 component, due to the collective motion of the entire nuclear charge. In the present work it is shown, based on combined angular correlation and linear polarization measurements, that the mixing ratios of all analyzed connecting transitions between low-lying bands in 135Pr interpreted as 0-, 1-, and 2-phonon wobbling bands, have absolute values smaller than one. This indicates predominant M1 magnetic character, which is incompatible with the proposed wobbling nature. All experimental observables are instead in good agreement with quasiparticle-plus-triaxial-rotor model calculations, which describe the bands as resulting from a rapid re-alignment of the total angular momentum from the short to the intermediate nuclear axis.

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Series: Physics letters. B
ISSN: 0370-2693
ISSN-E: 1873-2445
ISSN-L: 0370-2693
Volume: 824
Article number: 136840
DOI: 10.1016/j.physletb.2021.136840
Type of Publication: A1 Journal article – refereed
Field of Science: 115 Astronomy and space science
114 Physical sciences
119 Other natural sciences
Funding: This work has been supported by the Special Research Assistant Project of the Chinese Academy of Sciences; by the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB34000000); by the Academy of Finland under the Finnish Centre of Excellence Programme (2012-2017); by the EU 7th Framework Programme Project No. 262010 (ENSAR); by the National Research Foundation of South Africa (Grants No. 116666 and No. 109134), and by the French Ministry of Foreign Affairs and the Ministry of Higher Education and Research, France (PHC PROTEA Grant No. 42417SE); by the National Research, Development and Innovation Fund of Hungary (Project No. K128947), as well as by the European Regional Development Fund (Contract No. GINOP-2.3.3-15-2016-00034); by the Polish National Science Centre (NCN) Grant No. 2013/10/M/ST2/00427; by the Swedish Research Council under Grant No. 621-2014-5558. The use of germanium detectors from the GAMMAPOOL is acknowledged. I.K. was supported by National Research, Development and Innovation Office-NKFIH, contract number PD 124717.
Dataset Reference: Supplementary material related to this article can be found online at
Copyright information: © 2021 The Author(s). This is an open access article under the CC BY license (