scholarly journals Nuclear shape phase transition SU(3)→U(5)→SU(3) of the yrast-band structure in 182Os from nucleonic order

2010 ◽  
Vol 59 (5) ◽  
pp. 3136
Author(s):  
Tong Hong ◽  
Zhang Chun-Mei ◽  
Shi Zhu-Yi ◽  
Wang Hong ◽  
Ni Shao-Yong
Keyword(s):  
Phase Transition ◽  
Band Structure ◽  
Nuclear Shape ◽  
Yrast Band ◽  
Shape Phase Transition ◽  
Nuclear Shape Phase Transition

scholarly journals Z(5): critical point symmetry for the prolate to oblate nuclear shape phase transition

2004 ◽  
Vol 588 (3-4) ◽  
pp. 172-179 ◽  
Author(s):  
Dennis Bonatsos ◽  
D. Lenis ◽  
D. Petrellis ◽  
P.A. Terziev
Keyword(s):  
Phase Transition ◽  
Critical Point ◽  
Nuclear Shape ◽  
Point Symmetry ◽  
Shape Phase Transition ◽  
Nuclear Shape Phase Transition

ROTATIONAL DRIVEN NUCLEAR SHAPE PHASE TRANSITION OF THE YRAST STATES OF INDIVIDUAL NUCLEUS IN INTERACTING BOSON MODEL

2006 ◽  
Vol 15 (08) ◽  
pp. 1711-1721 ◽  
Author(s):  
YUE ZHAO ◽  
YANG LIU ◽  
LIANG-ZHU MU ◽  
YU-XIN LIU
Keyword(s):  
Phase Transition ◽  
Angular Momentum ◽  
Interaction Parameters ◽  
Interacting Boson Model ◽  
Angular Momentum Projection ◽  
Prolate Shape ◽  
Boson Model ◽  
Shape Phase Transition ◽  
Nuclear Shape Phase Transition ◽  
Special Region

With the intrinsic coherent state formalism and the angular momentum projection, we study the shape phase structure of the yrast states in the dynamical symmetries of the IBM. We found that the states in the U (5) symmetry can undergo a rotation driven vibrational to axially rotational shape phase transition if the interaction parameters take negative values smaller than the critical ones. It shows that the U (5) symmetry of the IBM1 is an appropriate approach to describe the rotation driven shape phase transition along the yrast line of individual nucleus as the interaction parameters are taken in a special region. The O (6) symmetric yrast states may involve a phase transition from γ-soft rotation to triaxial rotation as the angular momentum increases, if the interaction parameters are specially chosen. And the yrast states in SU (3) symmetry always appear in the axially prolate shape phase.

scholarly journals Z(5): Critical Point Symmetry for the Prolate to Oblate Nuclear Shape Phase Transition

2020 ◽  
Vol 13 ◽  
pp. 73
Author(s):  
Dennis Bonatsos ◽  
D. Lenis ◽  
D. Petrellis ◽  
P. A. Terziev
Keyword(s):  
Experimental Data ◽  
Phase Transition ◽  
Critical Point ◽  
Point Symmetry ◽  
Transition Rates ◽  
Oblate Shape ◽  
Scale Factors ◽  
Shape Phase Transition ◽  
Nuclear Shape Phase Transition ◽  
Good Agreement

A critical point symmetry for the prolate to oblate shape phase transition is intro­ duced, starting from the Bohr Hamiltonian and approximately separating variables for γ=30°. Parameter-free (up to overall scale factors) predictions for spectra and B(E2) transition rates are found to be in good agreement with experimental data for 194Pt, which is supposed to be located very close to the prolate to oblate critical point, as well as for its neighbours (192Pt, 196Pt).

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