Naslov
Microscopic description of spherical to gamma-soft shape transitions in Ba and Xe nuclei
(Microscopic description of spherical to γ-soft shape transitions in Ba and Xe nuclei)

Autori
Li, Zhipan ; Nikšić, Tamara ; Vretenar, Dario ; Meng, Jie

Izvornik
Physical Review C (0556-2813) 81 (2010), 3; 034316-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
PACS: 21.60.Jz ; 21.60.Ev ; 21.10.Re ; 21.90.+f
(QUANTUM PHASE-TRANSITIONS ; MEAN-FIELD THEORY ; CRITICAL-POINT ; COULOMB-EXCITATION ; ISOTOPES ; EVOLUTION ; BA-134)

Sažetak
The rapid transition between spherical and γ-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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA