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Title: Self-Consistent Tilted-Axis-Cranking Study of Triaxial Strongly Deformed Bands in ^{158}Er at Ultrahigh Spin

Abstract

Stimulated by recent experimental discoveries, triaxial strongly deformed (TSD) states in ^{158}Er at ultrahigh spins have been studied by means of the Skyrme-Hartree-Fock model and the tilted-axis-cranking method. Restricting the rotational axis to one of the principal axes - as done in previous cranking calculations - two well-defined TSD minima in the total Routhian surface are found for a given configuration: one with positive and another with negative triaxial deformation gamma. By allowing the rotational axis to change direction, the higher-energy minimum is shown to be a saddle point. This resolves the long-standing question of the physical interpretation of the two triaxial minima at a very similar quadrupole shape obtained in the principal axis cranking approach. Several TSD configurations have been predicted, including a highly deformed band expected to cross lesser elongated TSD bands at the highest spins. Its transitional quadrupole moment Q_{t} ~ 10.5 eb is close to the measured value of ~11 eb; hence, it is a candidate for the structure observed in experiment.

Authors:
 [1];  [2];  [3];  [4];  [5];  [1];  [6]
  1. Peking University
  2. Warsaw University
  3. University of Notre Dame, IN
  4. ORNL
  5. University of Tennessee, Knoxville (UTK) & Oak Ridge National Laboratory (ORNL)
  6. University of Tennessee, Knoxville (UTK)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1050324
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 108; Journal Issue: 9; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CONFIGURATION; DATA; DEFORMATION; QUADRUPOLE MOMENTS; QUADRUPOLES; SHAPE; SPIN

Citation Formats

Shi, Yue, Dobaczewski, J., Frauendorf, S., Nazarewicz, Witold, Pei, J. C., Xu, F. R., and Nikolov, N. Self-Consistent Tilted-Axis-Cranking Study of Triaxial Strongly Deformed Bands in ^{158}Er at Ultrahigh Spin. United States: N. p., 2012. Web. doi:10.1103/PhysRevLett.108.092501.
Shi, Yue, Dobaczewski, J., Frauendorf, S., Nazarewicz, Witold, Pei, J. C., Xu, F. R., & Nikolov, N. Self-Consistent Tilted-Axis-Cranking Study of Triaxial Strongly Deformed Bands in ^{158}Er at Ultrahigh Spin. United States. https://doi.org/10.1103/PhysRevLett.108.092501
Shi, Yue, Dobaczewski, J., Frauendorf, S., Nazarewicz, Witold, Pei, J. C., Xu, F. R., and Nikolov, N. Sun . "Self-Consistent Tilted-Axis-Cranking Study of Triaxial Strongly Deformed Bands in ^{158}Er at Ultrahigh Spin". United States. https://doi.org/10.1103/PhysRevLett.108.092501.
@article{osti_1050324,
title = {Self-Consistent Tilted-Axis-Cranking Study of Triaxial Strongly Deformed Bands in ^{158}Er at Ultrahigh Spin},
author = {Shi, Yue and Dobaczewski, J. and Frauendorf, S. and Nazarewicz, Witold and Pei, J. C. and Xu, F. R. and Nikolov, N.},
abstractNote = {Stimulated by recent experimental discoveries, triaxial strongly deformed (TSD) states in ^{158}Er at ultrahigh spins have been studied by means of the Skyrme-Hartree-Fock model and the tilted-axis-cranking method. Restricting the rotational axis to one of the principal axes - as done in previous cranking calculations - two well-defined TSD minima in the total Routhian surface are found for a given configuration: one with positive and another with negative triaxial deformation gamma. By allowing the rotational axis to change direction, the higher-energy minimum is shown to be a saddle point. This resolves the long-standing question of the physical interpretation of the two triaxial minima at a very similar quadrupole shape obtained in the principal axis cranking approach. Several TSD configurations have been predicted, including a highly deformed band expected to cross lesser elongated TSD bands at the highest spins. Its transitional quadrupole moment Q_{t} ~ 10.5 eb is close to the measured value of ~11 eb; hence, it is a candidate for the structure observed in experiment.},
doi = {10.1103/PhysRevLett.108.092501},
url = {https://www.osti.gov/biblio/1050324}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 9,
volume = 108,
place = {United States},
year = {2012},
month = {1}
}

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