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Microscopic analysis of the octupole phase transition in Th isotopes

Aug 5, 2013
5 pages
Published in:
  • Phys.Rev.C 88 (2013) 021303
  • Published: Aug 19, 2013
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Abstract: (APS)
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 density dependent point coupling (DD-PC1) functional 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.
Note:
  • 6 pages, 5 figures, accepted for publication in Physical Review C, Rapid Communication
  • 21.10.Re
  • 21.60.Ev
  • 21.60.Fw
  • 21.60.Jz
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