SU(4) symmetry and Wigner energy in the infinite nuclear matter mass model- art. no. 057303

The measures for SU(4) symmetry and the Wigner energy, in terms of double b inding energy differences, for even-even and odd-odd nuclei in A = 56-100 m ass region are studied using the infinite nuclear matter (INM) mass model o f atomic nuclei. The INM model predicts that the SU(4) symmetry is broken i n even-even nuclei but remnants of this symmetry should be present in N=Z o dd-odd nuclei in this region. Similarly, the estimates of the Wigner energy indicate that the T=0 states in these nuclei should start appearing around 0.5 MeV above the ground states that are T=1 in nature.