43 research outputs found
Intertwined quantum phase transitions in the Zr chain
We introduce the notion of intertwined quantum phase transitions (IQPTs), for
which a crossing of two configurations coexists with a pronounced
shape-evolution of each configuration. A detailed analysis in the framework of
the interacting boson model with configuration mixing, provides evidence for
this scenario in the Zr isotopes. The latter exhibit a normal configuration
which remains spherical along the chain, but exchanges roles with an intruder
configuration, which undergoes first a spherical to prolate-deformed
[U(5)SU(3)] QPT and then a crossover to -unstable
[SU(3)SO(6)].Comment: 4 pages, 5 figures, Proceedings of the IV International Conference on
Nuclear Structure and Dynamics NSD2019, May 13-17, 2019, Venice, Ital
Intertwined quantum phase transitions in odd-mass Nb isotopes
A detailed analysis of odd-mass Nb isotopes, in the framework of the
interacting boson-fermion model with configuration mixing, discloses the
effects of an abrupt crossing of states in normal and intruder configurations
(Type~II QPT), on top of which superimposed a gradual evolution from spherical-
to deformed-core shapes within the intruder configuration (Type~I QPT). The
pronounced presence of both types of QPTs demonstrates, for the first time, the
occurrence of intertwined QPTs in odd-mass nuclei.Comment: 5 pages, 5 figures, Proceedings 17th International Symposium on
Capture Gamma-Ray Spectroscopy and Related Topics (CGS17), July 17-21, 2023,
Grenoble, Franc
Partial dynamical symmetry from energy density functionals
We show that the notion of partial dynamical symmetry is robust and founded
on a microscopic many-body theory of nuclei. Based on the universal energy
density functional framework, a general quantal boson Hamiltonian is derived
and shown to have essentially the same spectroscopic character as that
predicted by the partial SU(3) symmetry. The principal conclusion holds in two
representative classes of energy density functionals: nonrelativistic and
relativistic. The analysis is illustrated in application to the
axially-deformed nucleus Er.Comment: 7 pages, 3 figures, 1 tabl