Microscopic analysis of the octupole phase transition in Th isotopes

Abstract

A shape phase transition between stable octupole deformation and octupole vibrations in Th nuclei is analyzed in a microscopic framework based on nuclear density functional theory. The relativistic functional DD-PC1 is used to calculate axially-symmetric quadrupole-octupole constrained energy surfaces. Observables related to order parameters are computed using an interacting-boson Hamiltonian, with parameters determined by mapping the microscopic energy surfaces to the expectation value of the Hamiltonian in the boson condensate. The systematics of constrained energy surfaces and low-energy excitation spectra point to the occurrence of a phase transition between octupole-deformed shapes and shapes characterized by octupole-soft potentials.

6 pages, 5 figures, accepted for publication in Physical Review C, Rapid Communication

References in corpus (6)

• Relativistic Nuclear Energy Density Functionals: adjusting parameters to binding energies
• Microscopic Formulation of Interacting Boson Model for Rotational Nuclei
• Energy Density Functional analysis of shape evolution in N=28 isotones
• Non-yrast nuclear spectra in a model of coherent quadrupole-octupole motion
• Description of nuclear octupole and quadrupole deformation close to the axial symmetry: Critical-point behavior of 224Ra and 224Th
• Description of nuclear octupole and quadrupole deformation close to the axial symmetry: Octupole vibrations in the X(5) nuclei 150Nd and 152Sm

Cited by in corpus (40)

• Mean field and beyond description of nuclear structure with the Gogny force: A review
• Octupole deformation in the ground states of even-even nuclei: a global analysis within the covariant density functional theory
• Microscopic description of octupole shape-phase transitions in light actinides and rare-earth nuclei
• Multidimensionally-constrained covariant density functional theories --- nuclear shapes and potential energy surfaces
• Spectroscopy of quadrupole and octupole states in rare-earth nuclei from a Gogny force
• Coexistence of nuclear shapes: self-consistent mean-field and beyond
• Spectroscopy of reflection-asymmetric nuclei with relativistic energy density functionals
• Tetrahedral shapes of neutron-rich Zr isotopes from multidimensionally-constrained relativistic Hartree-Bogoliubov model
• Shape coexistence in the microscopically guided interacting boson model
• Time-dependent generator coordinate method study of mass-asymmetric fission of actinides
• Octupole deformation in the ground states of even-even $Z\sim 96,N\sim 196$ actinides and superheavy nuclei
• Octupole deformation in light actinides within an analytic quadrupole octupole axially symmetric model with Davidson potential
• The impact of the surface energy coefficient on the deformation properties of atomic nuclei as predicted by Skyrme energy density functionals
• Signatures of shape phase transitions in odd-mass nuclei
• Evolution of octupole deformation and collectivity in neutron-rich lanthanides
• Octupole correlations in light actinides from the interacting boson model based on the Gogny energy density functional
• Signatures of octupole correlations in neutron-rich odd-mass barium isotopes
• Quadrupole-octupole coupling and the onset of octupole deformation in actinides
• High-resolution $(p,t)$ study of low-spin states in ${}^{240}$Pu: Octupole excitations, $\alpha$ clustering, and other structure features
• Microscopic core-quasiparticle coupling model for spectroscopy of odd-mass nuclei with octupole correlations
• Angular momentum and parity projected multidimensionally constrained relativistic Hartree-Bogoliubov model
• Microscopic description of quadrupole-octupole coupling in neutron-rich actinides and superheavy nuclei with the Gogny-D1M energy density functional
• Microscopic description of quadrupole-octupole coupling in actinides with the Gogny-D1M energy density functional
• Microscopic description of octupole collective excitations near $N=56$ and $N=88$
• Microscopic analysis of octupole shape transitions in neutron-rich actinides with relativistic energy density functional
• Pairing vibrations in the interacting boson model based on density functional theory
• Quadrupole-octupole coupling and the evolution of collectivity in neutron-deficient Xe, Ba, Ce, and Nd isotopes
• Octupole correlations in collective excitations of neutron-rich $N\approx 56$ nuclei
• Impacts of hexadecapole deformations on the collective energy spectra of axially deformed nuclei
• Low-energy structure and $\beta$ decay properties of neutron-rich nuclei in the region of a shape phase transition
• Microscopic description of hexadecapole collectivity in even-even rare-earth nuclei near $N=90$
• Beyond-mean-field description of octupolarity in dysprosium isotopes with the Gogny-D1M energy density functional
• Mapped interacting boson model for nuclear structure studies
• Quadrupole-hexadecapole correlations in neutron-rich samarium and gadolinium isotopes
• Simultaneous description of low-lying positive and negative parity bands in heavy even-even nuclei
• Role of octupole shape degree of freedom in neutron-rich odd-mass xenon isotopes
• Mapped $spdf$ interacting boson model for quadrupole-octupole collective states in nuclei
• Quadrupole and octupole states in ${}^{152}$Sm using the proton-neutron interacting boson model
• Signatures of octupole shape phase transitions in radioactive nuclei
• Impacts of hexadecapole correlations in actinide nuclei