Abstract

The isotopes 130, 132, 134, 136Ce are investigated by means of the reactions 118, 120, 122, 124Sn( 16O, 4n) at bombarding energies between 68 and 76 MeV. From lifetime measurements a reduction of the collective behaviour is observed with increasing neutron number. Yrast cascades of rotational structure are identified up to angular momenta I = 16 + orI = 18 + in 130, 132, 134 Ce . These cascades show a strong “back-bending” effect. In 136Ce no such simple yrast cascade could be found

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