Shell model description of "mixed-symmetry" states in 94Mo
  Shell model calculations have been performed for the nucleus 94Mo. The calculated excitation energies and electromagnetic properties of low-lying states are in good agreement with the data, which include states with mixed-symmetry (MS) assignments in previous interacting boson model studies. In the shell model large isoscalar E2 matrix elements are found between states with MS assignments indicating that they form a class of states with similar proton-neutron symmetry. 
A.F.Lisetskiy, N.Pietralla, C.Fransen, R.V.Jolos, P. von Brentano