THE STUDY OF THE NEUTRON N = 90 NUCLEI
We use a new scheme to describe the X(5) nuclei, in which the SU(3) quadrupole-quadrupole interaction is replaced by the SO(6) cubic [Q(0) × Q(0) × Q(0)]0 interaction. Some energy ratios and B(E2) ratios of X(5) nuclei are studied in this work. The results of this new scheme are compared with the corresponding experimental data and those of the traditional U(5)-SU(3) description. It is shown that the results from this new scheme are better than those of the traditional description.