Possible E(5/4) symmetry in (135)ba

Abstract

The nucleus Ba-135 was investigated as a possible candidate for E(5/4), a non-trivial example of critical point symmetry in odd mass nuclei, for the case of a gamma-soft liquid drop with quadrupole deformation coupled to a particle with j = 3/2. Comparison of the E(5/4), Interacting Boson-Fermion Approximation, Particle-Vibrator Coupling Model and Shell Model calculations with the data are presented.