Spin-parity Assignments and Extension of the 02+band In158er

T. S. Dinoko,J. N. Orce,J. F. Sharpey-Schafer,M. Wiedeking,R. A. Bark,S. P. Bvumbi,P. Jones,E. A. M. A. Khaleel,E. A. Lawrie,J. J. Lawrie,S. N. T. Majola,P. L. Masiteng,H. Mohammed,S. S. Ntshangase,P. Papka,O. Shirinda,M. Stankiewicz, E. N. Zhou

EPJ web of conferences（2013）

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Abstract

Low and medium spin collective structures in 158Er have been studied using the 150Sm(12C,4nγγ) fusion-evaporation reaction at a beam energy of Elab = 65 MeV. A band built on the 02+ excitation has been established and extended to Jπ = 18+ from the analysis of γ-γ coincidence relationships, intensity arguments and DCO ratios. The 02+ band in 158Er presents a similar trend to the 02+ bands in the lighter N = 90 isotones but lies about 125 keV higher. This systematic trend supports a similar configuration for the 02+ bands in the N = 90 isotones.

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