The spin and configurational structure of excited states of Cd127, the two-proton and three-neutron hole neighbor of Sn132, has been studied. An isomeric state with a half-life of 17.5(3) μs was populated in the fragmentation of a Xe136 beam on a Be9 target at a beam energy of 750 MeV/u. Time distributions of the delayed γ transitions and γγ coincidence relations were exploited to construct a decay scheme. The observed yrast (19/2)+ isomer is proposed to have dominant configurations of ν(h11/2-3)π(g9/2-1,p1/2-1), ν(h11/2-2d3/2-1)π(g9/2-2), and ν(h11/2-2,s1/2-1)π(g9/2-2) and to decay by two competing stretched M2 and E3 transitions. Experimental results are compared with the isotone Sn129. The new information provides input for the proton-neutron interaction and the evolution of neutron hole energies in nuclei around the doubly magic Sn132 core. © 2010 The American Physical Society.

Support of German Federal Ministry of Education and Research (06KY205I), the EU Access to Large Scale Facilities Programme (EURONS, EUContract No. 506065), the PolishMinistry of Science and Higher Education (1-P03B-030-30 and 620/E-77/SPB/GSI/P-03/DWM105/2004-2007), the Spanish Ministerio de Ciencia e Innovaci´on (FPA2007-66069 and FPA2009-13377-C02-02), EPSRC/STFC (UK), the Swedish Research Council, the Bulgarian Science Fund VUF06/05, the US Department of Energy (DE-FG02-91ER-40609 and DE-AC02-06CH11357), the Hungarian Science Foundation

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