Isospectral superdeformed bands in the N = 46 nuclei 88Mo and 89Tc
Department of Physics, Royal Institute of Technology, SE-10691, Stockholm, Sweden
2 Nuclear Science Division, Lawrence Berkeley National Laboratory, CA 94720, Berkeley, USA
3 Physics Division, Argonne National Laboratory, IL 60439, Argonne, USA
4 Department of Chemistry, Washington University, MO 63130, St. Louis, USA
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Superdeformed bands in 88Mo and 89Tc were populated using 40Ca-induced fusion-evaporation reactions on 58Ni at a beam energy of 185MeV. Gamma-rays emitted in the reactions were detected using the Gammasphere spectrometer, in coincidence with charged particles detected by the Microball array. A new superdeformed band was assigned to the nucleus 88Mo, leading to a revisit of earlier configuration assignments for superdeformed structures in this nucleus. In particular, the theoretical interpretation of a pair of identical (isospectral) superdeformed bands in 88Mo/89Tc is discussed. The configurations that are assigned to the four SD bands belonging to 88Mo have properties that are predicted to be significantly affected by pair correlations.
© Società Italiana di Fisica and Springer-Verlag, 2004