Systematic Analysis of Shape Evolution for N=60 Isotonic Chain in Relativistic Mean|field Model

Key words: 
• relativistic mean field /
• quadruple deformation /
• shape phase transition

Abstract: The shape phase transition between spherical U（5）and axially SU（3）deformed nuclei is investigated systemically for N=60 isotonic chain by the constrained relativistic mean|field theory with the interactions NL3 and PK1. The values of bind energy and quadruple deformation β2 are calculated and a good agreement is obtained as compared with the experiments. By examining the potential energy curve and single particle spectra obtained with this microscopic approach, the possible critical point nuclei with the structure of shape phase transition are suggested to be 114Xe and 116Ba, which is favored by the experiments.
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