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.
Isomer spectroscopy of Cd127 / F. Naqvi, M. Górska, L. Cáceres, A. Jungclaus, M. Pfützner, H. Grawe, F. Nowacki, K. Sieja, S. Pietri, E. Werner-Malento, P.H. Regan, D. Rudolf, Z. Podolyák, J. Jolie, K. Andgren, T. Beck, P. Bednarczyk, J. Benlliure, G. Benzoni, A.M. Bruce, E. Casarejos, B. Cederwall, F.C.L. Crespi, P. Detistov, Z. Dombrádi, P. Doornenbal, H. Geissel, J. Gerl, J. Grȩbosz, B. Hadinia, M. Hellström, R. 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. - In: PHYSICAL REVIEW. C, NUCLEAR PHYSICS. - ISSN 0556-2813. - 82:3(2010 Sep 24), pp. 034323.1-034323.5.
Isomer spectroscopy of Cd127
F.C.L. Crespi;
2010
Abstract
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.File | Dimensione | Formato | |
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