Naslov
Microscopic analysis of the octupole phase transition in Th isotopes

Autori
Nomura, Kosuke ; Vretenar, Dario ; Lu, Bing-nan

Izvornik
Physical Review C - Nuclear Physics (0556-2813) 88 (2013), 2; 021303-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, kratko priopcenje, znanstveni

Ključne riječi
octupole phase transition; Interacting boson-fermion model; actinides

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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