Abstract
A hamiltonian with broken u( 6 2 j+1) supersymmetry is proposed that can describe collective excitations in nuclei with high-spin, single- j orbitals. Its bosonic part is identical with IBA, while the fermionic degrees of freedom, are characterized by the seniority quantum number. The ground state as well as excited energies of eight xenon isotopes with both odd and even mass are fairly well described by the so(6) limit of this hamiltonian with only one set of parameters.
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