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EDP Sciences, EPJ Web of Conferences, (63), p. 01005, 2013

DOI: 10.1051/epjconf/20136301005

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Spin-parity assignments and extension of the 0<sub>2</sub><sup>+</sup>band in<sup>158</sup>Er

Journal article published in 2013 by T. S. Dinoko, J. N. Orce, J. F. Sharpey-Schafer, M. Wiedeking, R. A. Bark, S. P. Bvumbi, P. Jones ORCID, E. A. M. A. Khaleel, E. A. Lawrie ORCID, J. J. Lawrie, S. N. T. Majola ORCID, P. L. Masiteng, H. Mohammed, S. S. Ntshangase, P. Papka and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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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.