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

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.; Pakarinen, J.; Papadakis, P.; Partanen, J.; Rahkila, P.; Ruotsalainen, P.; Sandzelius, M.; Sarén, J.; Scholey, C.; Sorri, J.; Stolze, S.; Uusitalo, J.; Cederwall, B.; Ertoprak, A.; Liu, H.; Kuti, I.; Timár, J.; Tucholski, A.; Srebrny, J.; Andreoiu, C.

doi:10.1016/j.physletb.2021.136840

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

Journal Article · 14 December 2021 · Physics Letters. B

DOI: https://doi.org/10.1016/j.physletb.2021.136840 · OSTI ID:1869182

Lv, B. F. ^[1];

^[2]; Lawrie, E. A. ^[3]; Guo, S. ^[4]; Astier, A. ^[2]; Zheng, K. K. ^[1]; Ong, H. J. ^[4]; Wang, J. G. ^[4]; Zhou, X. H. ^[4]; Sun, Z. Y. ^[4]; Greenlees, P. T. ^[5]; Badran, H. ^[5]; Calverley, T. ^[6]; Cox, D. M. ^[7]; Grahn, T. ^[5]; Hilton, J. ^[6]; Julin, R. ^[5]; Juutinen, S. ^[5]; Konki, J. ^[8]; Pakarinen, J. ^[5] more »

Chinese Academy of Sciences (CAS) (China); Université Paris-Saclay, Orsay (France)
Université Paris-Saclay, Orsay (France)
National Research Foundation (South Africa); Univ. of the Western Cape, Bellville (South Africa)
Chinese Academy of Sciences (CAS) (China); University of Chinese Academy of Sciences, Beijing (China)
Univ. of Jyvaskyla (Finland)
Univ. of Jyvaskyla (Finland); Univ. of Liverpool (United Kingdom)
Univ. of Jyvaskyla (Finland); Lund Univ. (Sweden)
Univ. of Jyvaskyla (Finland); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
Univ. of Jyvaskyla (Finland); University of Oulu (Finland)
Univ. of Jyvaskyla (Finland); Argonne National Lab. (ANL), Argonne, IL (United States)
KTH Royal Inst. of Technology, Stockholm (Sweden)
MTA Atomki, Debrecen (Hungary)
Univ. of Warsaw (Poland)
Simon Fraser Univ., Burnaby, BC (Canada)

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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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: French Ministry of Foreign Affairs and the Ministry of Higher Education and Research; National Research Foundation of South Africa; PHC PROTEA; Polish National Science Centre (NCN); Strategic Priority Research Program of Chinese Academy of Sciences; Swedish Research Council; USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1869182

Journal Information:: Physics Letters. B, Journal Name: Physics Letters. B Vol. 824; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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