Triaxial-band structures, chirality, and magnetic rotation in La133

Petrache, C. M.; Chen, Q. B.; Guo, S.; Ayangeakaa, A. D.; Garg, U.; Matta, J. T.; Nayak, B. K.; Patel, D.; Meng, J.; Carpenter, M. P.; Chiara, C. J.; Janssens, R. V.  F.; Kondev, F. G.; Lauritsen, T.; Seweryniak, D.; Zhu, S.; Ghugre, S. S.; Palit, R.

doi:10.1103/PhysRevC.94.064309

Title: Triaxial-band structures, chirality, and magnetic rotation in ${}^{133}{La}$

Journal Article · Mon Dec 05 00:00:00 EST 2016 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.94.064309· OSTI ID:1334327

Petrache, C. M. ^[1]; Chen, Q. B. ^[2]; Guo, S. ^[3]; Ayangeakaa, A. D. ^[4]; Garg, U. ^[5]; Matta, J. T. ^[6]; Nayak, B. K. ^[7]; Patel, D. ^[8]; Meng, J. ^[2]; Carpenter, M. P. ^[9]; Chiara, C. J. ^[10]; Janssens, R. V. F. ^[9]; Kondev, F. G. ^[9]; Lauritsen, T. ^[9]; Seweryniak, D. ^[9]; Zhu, S. ^[9]; Ghugre, S. S. ^[11]; Palit, R. ^[12]

CNRS/IN2P3, and Univ. Paris-Saclay, Orsay (France)
Peking Univ., Beijing (China)
CNRS/IN2P3, and Univ. Paris-Saclay, Orsay (France); Chinese Academy of Sciences, Lanzhou (France)
Univ. of Notre Dame, Notre Dame, IN (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Univ. of Notre Dame, Notre Dame, IN (United States)
Univ. of Notre Dame, Notre Dame, IN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Univ. of Notre Dame, Notre Dame, IN (United States); Bhabha Atomic Research Centre, Mumbai (India)
Univ. of Notre Dame, Notre Dame, IN (United States); Anderson Cancer Center, Houston, TX (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Maryland, College Park, MD (United States); U.S. Army Research Lab., Adelphi, MD (United States)
UGC-DAE Consortium for Science Research, Kolkata (India)
Tata Institute of Fundamental Research, Mumbai (India); Univ. of Notre Dame, Notre Dame, IN (United States)

The structure of ¹³³La has been investigated using the ¹¹⁶Cd(²²Ne,4pn) reaction and the Gammasphere array. Three new bands of quadrupole transitions and one band of dipole transitions are identified and the previously reported level scheme is revised and extended to higher spins. The observed structures are discussed using the cranked Nilsson-Strutinsky formalism, covariant density functional theory, and the particle-rotor model. Triaxial configurations are assigned to all observed bands. For the high-spin bands it is found that rotations around different axes can occur, depending on the configuration. The orientation of the angular momenta of the core and of the active particles is investigated, suggesting chiral rotation for two nearly degenerate dipole bands and magnetic rotation for one dipole band. As a result, it is shown that the h_11/2 neutron holes present in the configuration of the nearly degenerate dipole bands have significant angular momentum components not only along the long axis but also along the short axis, contributing to the balance of the angular momentum components along the short and long axes and thus giving rise to a chiral geometry.

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

Sponsoring Organization:: National Science Foundation (NSF); National Natural Science Foundation of China (NSFC); USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC02-06CH11357; FG02-94ER40834

OSTI ID:: 1334327

Alternate ID(s):: OSTI ID: 1334360

Journal Information:: Physical Review C, Vol. 94, Issue 6; ISSN 2469-9985

Publisher:: APSCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 20 works

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Chirality of ${}^{135}{Nd}$ reexamined: Evidence for multiple chiral doublet bands Lv, B. F.; Petrache, C. M.; Chen, Q. B. Physical Review C, Vol. 100, Issue 2 https://doi.org/10.1103/physrevc.100.024314	journal	August 2019
Behavior of the collective rotor in nuclear chiral motion Chen, Q. B.; Kaiser, N.; Meißner, Ulf-G. Physical Review C, Vol. 99, Issue 6 https://doi.org/10.1103/physrevc.99.064326	journal	June 2019
Longitudinal wobbling in 133La Biswas, S.; Palit, R.; Frauendorf, S. The European Physical Journal A, Vol. 55, Issue 9 https://doi.org/10.1140/epja/i2019-12856-5	journal	September 2019

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