Naslov
Microscopic analysis of nuclear quantum phase transitions in the N~90 region

Autori
Li, Z.P. ; Nikšić, Tamara ; Vretenar, Dario ; Meng, Jie ; Lalazissis, G.A. ; Ring, Peter

Izvornik
Physical Review C - Nuclear Physics (0556-2813) 79 (2009), 5; 054301-1

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

Ključne riječi
21.60.Jz; 21.60.Ev; 21.10.Re; 21.90.+f

Sažetak
The analysis of shape transitions in Nd isotopes, based on the framework of relativistic energy-density functionals and restricted to axially symmetric shapes in T. Nikšić, D. Vretenar, G. A. Lalazissis, and P. Ring [Phys. Rev. Lett. 99, 092502 (2007)], is extended to the region Z=60, 62, 64 with N[approximate]90 and includes both beta and gamma deformations. Collective excitation spectra and transition probabilities are calculated starting from 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 available data and show that there is an abrupt change of structure at N=90 that can be approximately characterized by the X(5) analytic solution at the critical point of the first-order quantum phase transition between spherical and axially deformed shapes.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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