engleski

High spin states in 137Nd : a large variety of collective rotations

The high spin structure of 137Nd has been studied through the 110Pd(Si,3n) and the 123Sb(19F,5n) reactions at beam energies of 125 and 97 MeV, respectively. A very complex level scheme has been established up to spin 97/2+ and 23.9 MeV of excitation energy. Regular bands are observed at high spin, consisting of either M1 and E2 crossover transitions, or of stretched M1 or E2 transitions. Calculations have been performed in the framework of the interacting boson-fermion model with broken pairs for the relatively strong Delta I=1 regular structures observed above spins 27/2- and 31/2-, which are well described by the nu h11/2^3 and nu h11/2pih11/2^2 configurations, respectively.

fusion-evaporation; configurations; interacting boson-fermion model with broken pairs calculations

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