skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Triaxiality and Exotic Rotations at High Spins in 134Ce

Abstract

High-spin states in Ce-134 have been investigated using the Cd-116(Ne-22,4n) reaction and the Gammasphere array. The level scheme has been extended to an excitation energy of similar to 30 MeV and spin similar to 54 (h) over bar. Two new dipole bands and four new sequences of quadrupole transitions were identified. Several new transitions have been added to a number of known bands. One of the strongly populated dipole bands was revised and placed differently in the level scheme, resolving a discrepancy between experiment and model calculations reported previously. Configurations are assigned to the observed bands based on cranked Nilsson-Strutinsky calculations. A coherent understanding of the various excitations, both at low and high spins, is thus obtained, supporting an interpretation in terms of coexistence of stable triaxial, highly deformed, and superdeformed shapes up to very high spins. Rotations around different axes of the triaxial nucleus, and sudden changes of the rotation axis in specific configurations, are identified, further elucidating the nature of high-spin collective excitations in the A = 130 mass region.

Authors:
 [1];  [1];  [2];  [2];  [2];  [2];  [2];  [3];  [4];  [3];  [3];  [3];  [3];  [3];  [5];  [6]
  1. CNRS/IN2P3. Univ. Paris (France)
  2. Univ. of Notre Dame, IN (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Maryland, College Park, MD (United States)
  5. UGC-DAE Consortium for Science Research, Kolkata (India)
  6. Tata Inst. of Fundamental Research, Mumbai (India); Univ. of Notre Dame, IN (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Science Foundation (NSF); USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1339560
Alternate Identifier(s):
OSTI ID: 1256130
Grant/Contract Number:  
AC02-06CH11357; FG02-94ER40834
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C, Nuclear Physics
Additional Journal Information:
Journal Volume: 93; Journal Issue: 6; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Petrache, C. M., Guo, S., Ayangeakaa, A. D., Garg, U., Matta, J. T., Nayak, B. K., Patel, D., Carpenter, M. P., Chiara, C. J., Janssens, R. V. F., Kondev, F. G., Lauritsen, T., Seweryniak, D., Zhu, S., Ghugre, S. S., and Palit, R.. Triaxiality and Exotic Rotations at High Spins in 134Ce. United States: N. p., 2016. Web. https://doi.org/10.1103/PhysRevC.93.064305.
Petrache, C. M., Guo, S., Ayangeakaa, A. D., Garg, U., Matta, J. T., Nayak, B. K., Patel, D., Carpenter, M. P., Chiara, C. J., Janssens, R. V. F., Kondev, F. G., Lauritsen, T., Seweryniak, D., Zhu, S., Ghugre, S. S., & Palit, R.. Triaxiality and Exotic Rotations at High Spins in 134Ce. United States. https://doi.org/10.1103/PhysRevC.93.064305
Petrache, C. M., Guo, S., Ayangeakaa, A. D., Garg, U., Matta, J. T., Nayak, B. K., Patel, D., Carpenter, M. P., Chiara, C. J., Janssens, R. V. F., Kondev, F. G., Lauritsen, T., Seweryniak, D., Zhu, S., Ghugre, S. S., and Palit, R.. Mon . "Triaxiality and Exotic Rotations at High Spins in 134Ce". United States. https://doi.org/10.1103/PhysRevC.93.064305. https://www.osti.gov/servlets/purl/1339560.
@article{osti_1339560,
title = {Triaxiality and Exotic Rotations at High Spins in 134Ce},
author = {Petrache, C. M. and Guo, S. and Ayangeakaa, A. D. and Garg, U. and Matta, J. T. and Nayak, B. K. and Patel, D. and Carpenter, M. P. and Chiara, C. J. and Janssens, R. V. F. and Kondev, F. G. and Lauritsen, T. and Seweryniak, D. and Zhu, S. and Ghugre, S. S. and Palit, R.},
abstractNote = {High-spin states in Ce-134 have been investigated using the Cd-116(Ne-22,4n) reaction and the Gammasphere array. The level scheme has been extended to an excitation energy of similar to 30 MeV and spin similar to 54 (h) over bar. Two new dipole bands and four new sequences of quadrupole transitions were identified. Several new transitions have been added to a number of known bands. One of the strongly populated dipole bands was revised and placed differently in the level scheme, resolving a discrepancy between experiment and model calculations reported previously. Configurations are assigned to the observed bands based on cranked Nilsson-Strutinsky calculations. A coherent understanding of the various excitations, both at low and high spins, is thus obtained, supporting an interpretation in terms of coexistence of stable triaxial, highly deformed, and superdeformed shapes up to very high spins. Rotations around different axes of the triaxial nucleus, and sudden changes of the rotation axis in specific configurations, are identified, further elucidating the nature of high-spin collective excitations in the A = 130 mass region.},
doi = {10.1103/PhysRevC.93.064305},
journal = {Physical Review C, Nuclear Physics},
number = 6,
volume = 93,
place = {United States},
year = {2016},
month = {6}
}

Journal Article:

Citation Metrics:
Cited by: 2 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Lifetimes of the yrast states of even Ce isotopes
journal, November 1977


Two neutron-dominated 10+ states in 134Ce
journal, December 1980


Study of the level structure in 134Ce
journal, April 1984


Prolate deformation of isomeric states in 134Ce and 142Sm
journal, November 1986


Magnetic rotation and shape mixing in Ce 134
journal, January 2004


Non-yrast states of Ce populated in -decay
journal, June 2000


Highly deformed and triaxial structures in 134 Ce
journal, March 1999

  • O’Brien, N. J.; Galindo-Uribarri, A.; Janzen, V. P.
  • Physical Review C, Vol. 59, Issue 3
  • DOI: 10.1103/PhysRevC.59.1334

High-spin yrast states in the γ -soft nuclei 135 Pr and 134 Ce
journal, October 2011


Evidence for Multiple Chiral Doublet Bands in Ce 133
journal, April 2013


Transverse Wobbling in Pr 135
journal, February 2015


The coexistence of the intruder , superdeformed and terminating bands in the A ∼ 135 mass region
journal, October 1996


Tilted axis rotation, candidates for chiral bands, and wobbling motion in 138 Nd
journal, October 2012


Switch from short-axis to intermediate-axis rotation in 138 Nd
journal, November 2013


Multiple triaxial bands in Nd 138
journal, February 2015


High-spin spectroscopy of 140 Nd
journal, July 2013


Shape evolution and magnetic rotation in 141Nd
journal, April 2015


Exotic rotations and triaxiality in Nd nuclei
journal, October 2015


Triaxial bands in Ce 133
journal, August 1996


In-beam spectroscopy of medium- and high-spin states in Ce 133
journal, May 2016


Termination of rotational bands: disappearance of quantum many-body collectivity
journal, December 1999


Rotational bands and particle-hole excitations at very high spin
journal, March 1985


Calculating the nuclear mass in the very high angular momentum regime
journal, July 2006


Gradual loss of collectivity in rotational bands in the A ∼ 110 (Z ⩾ 50, N ∼ 60) mass region
journal, August 1995


The GAMMASPHERE
journal, December 1990


ESCL8R and LEVIT8R: Software for interactive graphical analysis of HPGe coincidence data sets
journal, July 1995

  • Radford, D. C.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 361, Issue 1-2
  • DOI: 10.1016/0168-9002(95)00183-2

Background subtraction from in-beam HPGe coincidence data sets
journal, July 1995

  • Radford, D. C.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 361, Issue 1-2
  • DOI: 10.1016/0168-9002(95)00184-0

Isotropic gates in large gamma detector arrays versus angular distributions
journal, November 1997

  • Iacob, V. E.; Duchêne, G.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 399, Issue 1
  • DOI: 10.1016/S0168-9002(97)00872-3

Use of DCO ratios for spin determination in γ-γ coincidence measurements
journal, February 1989

  • Krämer-Flecken, A.; Morek, T.; Lieder, R. M.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 275, Issue 2
  • DOI: 10.1016/0168-9002(89)90706-7

Probing sd fp cross-shell interactions via terminating configurations in Sc 42 , 43
journal, May 2007


Electric quadrupole interaction of Ce isomers in tin
journal, December 1983

  • Dafni, E.; Davidovsky, F. D.; Gelberg, A.
  • Hyperfine Interactions, Vol. 15, Issue 1-4
  • DOI: 10.1007/BF02159726

Higher Order Corrections to the Cranking Model
journal, May 1965


Multiple dipole bands at prolate shapes in Nd 136 and their description through the projected shell model
journal, June 1996


Magnetic moments at backbending and spectroscopy of 134Ce
journal, July 1982


Competing mechanism for generating high spin excitations in γ-soft nuclei: the 136Nd case
journal, April 1996


Multi-quasiparticle γ-band structure in neutron-deficient Ce and Nd isotopes
journal, June 2009


    Works referencing / citing this record:

    Highly deformed bands in Nd nuclei: New results and consistent interpretation within the cranked Nilsson-Strutinsky formalism
    journal, November 2019


    Evolution from γ -soft to stable triaxiality in Nd 136 as a prerequisite of chirality
    journal, October 2018