Isomer Spectroscopy of Cd-127

F. Naqvi, M. Gorska, L. Caceres, A. Jungclaus, M. Pfuetzner, H. Grawe, F. Nowacki, K. Sieja, S. Pietri, E. Werner-Malento, P. H. Regan, Dirk Rudolph, Z. Podolyak, J. Jolie, K. Andgren, T. Beck, P. Bednarczyk, J. Benlliure, G. Benzoni, A. M. BruceE. Casarejos, B. Cederwall, F. C. L. Crespi, P. Detistov, Zs. Dombradi, P. Doornenbal, H. Geissel, J. Gerl, J. Grebosz, B. Hadinia, Margareta Hellström, Robert Hoischen, G. Ilie, A. Khaplanov, I. Kojouharov, M. Kmiecik, N. Kurz, S. Lalkovski, A. Maj, S. Mandal, V. Modamio, F. Montes, S. Myalski, W. Prokopowicz, P. Reiter, H. Schaffner, G. Simpson, D. Sohler, S. J. Steer, S. Tashenov, J. Walker, O. Wieland, H. J. Wollersheim

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Abstract

The spin and configurational structure of excited states of Cd-127, the two-proton and three-neutron hole neighbor of Sn-132, has been studied. An isomeric state with a half-life of 17.5(3) mu s was populated in the fragmentation of a Xe-136 beam on a Be-9 target at a beam energy of 750 MeV/u. Time distributions of the delayed gamma transitions and gamma gamma coincidence relations were exploited to construct a decay scheme. The observed yrast (19/2)(+) isomer is proposed to have dominant configurations of nu(h(11/2)(-3))pi(g(9/2)(-1), p(1/2)(-1)), nu(h(11/2)(-2)d(3/2)(-1))pi(g(9/2)(-2)), and nu(h(11/2)(-2), s(1/2)(-1))pi(g(9/2)(-2)) and to decay by two competing stretched M2 and E3 transitions. Experimental results are compared with the isotone Sn-129. The new information provides input for the proton-neutron interaction and the evolution of neutron hole energies in nuclei around the doubly magic Sn-132 core.
Original languageEnglish
Pages (from-to)034323-034323-5
JournalPhysical Review C (Nuclear Physics)
Volume82
Issue number3
DOIs
Publication statusPublished - 2010

Subject classification (UKÄ)

  • Subatomic Physics

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