Euclidean Dynamical Symmetry in Nuclear Shape Phase Transitions
  The Euclidean dynamical symmetry hidden in the critical region of nuclear shape phase transitions is revealed by a novel algebraic F(5) description. With a nonlinear projection, it is shown that the dynamics in the critical region of the spherical--axial deformed and the spherical--$\gamma$ soft shape phase transitions can indeed be manifested by this description, which thus provides a unified symmetry--based interpretation of the critical phenomena in the region. 
Yu Zhang, Yu-Xin Liu, Feng Pan, Yang Sun, and J. P. Draayer
nucl-th