Second backbending in the yrast line of 156Er |
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Authors: | T Byrski FA Beck C Gehringer JC Merdinger Y Schutz JP Vivien J Dudek W Nazarewicz Z Szymański |
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Institution: | Centre de Recherches Nucléaires and Université Louis Pasteur, 67037 Strasbourg, France;Institute of Theoretical Physics, Warsaw University, 00-681 Warsaw, Poland |
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Abstract: | High spin yrast states of 156Er were investigated using the reactions 141Pr(19F,4nγ) and 123Sb(37Cl, 4nγ), the latter in connection with a sum-crystal. In addition to the backbending at , a second one is found at and the yrast band is extended up to . These results are interpreted in terms of a Hartree-Fock-Bogolyubov Cranking (HFBC) method. It is demonstrated that for deformations in the vicinity of the Strutinsky equilibrium deformation, both a 2qp proton band crossing the yrast band or a 4qp neutron band crossing the yrast band can cause strong secondary backbending. |
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