Journal
PHYSICAL REVIEW C
Volume 81, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.81.034316
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Funding
- MZOS [1191005-1010]
- Major State 973 Program [2007CB815000]
- NSFC [10775004, 10975008]
- Chinese-Croatian project Nuclear Structure and Astrophysical Applications
- Croatian National Foundation for Science, Higher Education and Technological Development
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The rapid transition between spherical and gamma-soft shapes in Ba and Xe nuclei in the mass region A >= 130 is analyzed using excitation spectra and collective wave functions obtained by diagonalization of a five-dimensional Hamiltonian for quadrupole vibrational and rotational degrees of freedom, with parameters determined by constrained self-consistent relativistic mean-field calculations for triaxial shapes. The results reproduce the characteristic evolution of excitation spectra and E2 transition probabilities, and in general, a good agreement with available data is obtained. The calculated spectra display fingerprints of a second-order shape phase transition that can approximately be described by analytic solutions corresponding to the E(5) dynamical symmetry.
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