Spin-isospin SU(4) symmetry breaking in statistical spectroscopy

Centroid energies and variances of fixed spin-isospin and SU(4) symmetry spectral distributions are calculated without any approximation in d-s shell nuclei by using some previously developed propagation techniques. Intensities of various irreducible representations of SU(4) near the ground state are evaluated and these provide a measure of symmetry breaking. The influence of the residual interaction is studied. The results are compared with those coming from fixed SU(4) symmetry distributions or from fixed spin-isospin and SU(4) symmetry distributions with an approximate calculation of the variances. © 1982.SCOPUS: ar.j