Investigation on phase and shape transitions in the hot rotating nucleus 154Dy

Influence of Quantal and Statistical Fluctuations on Phase Transitions in Finite Nuclei

“…[15] In our recent paper, we have studied the pairing-phase transition for the hot rotating nucleus 154 Dy. [16] In the present study, we have extended our investigation of nuclear phase transitions in light nuclei with the inclusion of quantal and statistical fluctuations. Calculations are executed for the fluctuations of selected observables that convey the signals for the phase transition like particle number, spin, pair gap, deformation, and energy.…”

Nuclear Specific Heat and Phase Transition in Finite Nuclear Systems

“…The phase transition from superfluid to normal nuclear matter has been elaborately investigated in the determination of single particle level density parameter as a function of angular momentum and temperature reported in Ref. [10]. In the present study, we have extended our investigation of nuclear phase transitions in light nuclei, with particular focus to its geometrical forms.…”

Description of Rotation Bands in 157,158 Er at Ultrahigh Spin

“…In summary, with the supersymmetry scheme including many-body interactions and perturbation possessing the SO (5) [or SU (5)] symmetry on the rotation symmetry, the rotation bands of 157 Er(1,2) and 158 Er(1,2) are investigated systematically in this paper. The calculated results show that, the E2 γ-ray energies and the dynamical moment of inertia with rotation frequency in the 157 Er(1,2) and 158 Er(1,2) bands can be described quantitatively well, and the spin value of the rotation bands in 157 Er(1,2) and 158 Er(1,2) agree with the experimental proposed.…”

“…More concretely, both the proton part and the neutron part have their own SU(3) symmetry (SU π (3), SU υ (3) ), but they do not couple with same contribution to form the SU π+υ (3) symmetry. For 158 Er(1) bands state, the theoretical predicted that the SO(5) [or SU (5)] symmetry may play a dominant role and coexist with SU(3) symmetry. There may be sphere coexisting headecupole deformed in 158 Er(1) rotation band state.…”

“…In the rare-earth region of the nuclear landscape, nuclei can accommodate the highest values of angular momentum and provide a wealth of new nuclear structure phenomena, such as, superdeformed nuclei around 152 Dy, [1] triaxial strongly deformed (TSD) bands and the asociated wobbling motion in nuclei around 167 Lu, [2] highly deformed structure in 171,172 Hf nuclei, [3] band termination and shape transitions in N ∼ 90 nuclei. [4,5] 158 Er was one of the initial nuclei in which Coriolisinduced pair breaking (backbending) was discovered and the first nucleus in which the second alignment was observed. [6] The evolution of the nuclear structure of 158 Er with spin shows that the first alignment of two i 13/2 neutrons at spin ∼ 14 is indicated, together with the second alignment of two h 11/2 protons at spin ∼ 28 .…”