Naslov
Microscopic analysis of spherical to gamma-soft shape transitions in Zn isotopes

Autori
Song, C.Y. ; Li, Z.P. ; Vretenar, Dario ; Meng, Jie

Izvornik
Science China - Physics Mechanics & Astronomy (1674-7348) 54 (2011), 2; 222-226

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

Ključne riječi
quantum phase transitions; E(5) critical-point symmetry; five-dimensional Hamiltonian

Sažetak
The rapid transition between spherical and gamma-soft shapes in Zn isotopes in the mass A a (c) 1/2 70 region, 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 microscopic potential energy surfaces, together with the characteristic collective observables, illustrate a rapid transition from near spherical shape at the N = 40 subshell, to gamma-soft deformed shapes for lighter isotopes. The calculated spectra display fingerprints of a second-order shape phase transition that can be approximately described by the E(5) analytic solution.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA