Tuesday, August 6, 2013

1308.0904 (K. Nomura et al.)

Microscopic analysis of the octupole phase transition in Th isotopes    [PDF]

K. Nomura, D. Vretenar, B. -N. Lu
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.
View original: http://arxiv.org/abs/1308.0904

No comments:

Post a Comment