Naslov
Shape-phase transitions in odd-mass gamma-soft nuclei with mass A ≈ 130

Autori
Nomura, Kosuke ; Nikšić, Tamara ; Vretenar, Dario

Izvornik
Physical review. C (2469-9985) 96 (2017), 1; 014304, 12

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
nuclear energy density functional, quantum phase transitions, collective levels

Sažetak
Quantum phase transitions between competing equilibrium shapes of nuclei with an odd number of nucleons are explored using a microscopic framework of nuclear energy density functionals and a fermion-boson coupling model. The boson Hamiltonian for the even-even core nucleus, as well as the spherical single-particle energies and occupation probabilities of unpaired nucleons, are completely determined by a constrained self-consistent mean-field calculation for a specific choice of the energy density functional and pairing interaction. Only the strength parameters of the particle-core coupling have to be adjusted to reproduce a few empirical low-energy spectroscopic properties of the corresponding odd-mass system. The model is applied to the odd-A Ba, Xe, La, and Cs isotopes with mass A≈130, for which the corresponding even- even Ba and Xe nuclei present a typical case of γ-soft nuclear potential. The theoretical results reproduce the experimental low-energy excitation spectra and electromagnetic properties, and confirm that a phase transition between nearly spherical and γ-soft nuclear shapes occurs also in the odd-A systems.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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