Neutron-rich 160,161,162Sm isotopes have been populated at the RIBF, RIKEN via β first time. β-coincident γ rays were observed in all three isotopes including γ rays from the isomeric decay of 160Sm and 162Sm. The isomers in 160Sm and 162Sm have previously been observed but have been populated via β decay for the first time. The isomeric state in 162Sm is assigned a configuration based on the decay pattern. The level schemes of 160Sm and 162Sm are presented. The ground states in the parent nuclei 160Pm and 162Pm are both assigned a configuration based on the population of states in the daughter nuclei. Blocked BCS calculations were performed to further investigate the spin-parities of the ground states in 160Pm, 161Pm, and 162Pm, and the isomeric state in 162Sm © The Authors, published by EDP Sciences, 2016

This work was carried out at the RIBF operated by RIKEN Nishina Center, RIKEN and CNS, University of Tokyo. All UK authors are supported by STFC. P. H. R. and G. L. are partially supported by the UK National Measurement Office (NMO). P.-A. S. was financed by JSPS Grant Number 23.01752 and the RIKEN Foreign Postdoctoral Researcher Program. J. T. was financed by Spanish Ministerio de Ciencia e Innovación under Contracts No. FPA2009-13377-C02 and No. FPA2011-29854-C04. Zs. D., I. K., and Zs. V. were supported by OTKA contract number K100835. We acknowledge the EUROBALL Owners Committee for the loan of germanium detectors and the PreSpec Collaboration for the readout electronics of the cluster detectors. This work was supported by JSPS KAKENHI Grant No. 25247045.

Z. Patel et al. ; 5 págs.; 7 figs.; 4 tabs. ; EPJ Web Conf.:Heavy Ion Accelerator Symposium 2015: International Nuclear Structure Conference in Remembrance of George Dracoulis ; Open Access funded by Creative Commons Atribution Licence 4.0

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