Spherical proton-neutron structure of isomeric states in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Cd</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>128</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>
L. CáceresGSI Helmholtz Centre for Heavy Ion ResearchM. GórskaGSI Helmholtz Centre for Heavy Ion ResearchA. JungclausDepartamento de Fsica Terica, Universidad Autnoma de Madrid, E-28049 Madrid, SpainM. PfütznerUniversity of WarsawH. Grawe, CNRS/IN2P3, Institut National Polytechnique de Grenoble, F-38026 Grenoble Cedex, FranceF. NowackiIReS, IN2P3-CNRS/University Louis Pasteur, F-67037, Strasbourg, FranceK. Sieja, CNRS/IN2P3, Institut National Polytechnique de Grenoble, F-38026 Grenoble Cedex, FranceS. PiétriDepartment of Physics, University of Surrey, Guildford GU2 7XH, United KingdomD. RudolphDepartment of Physics, Lund University, S-22100 Lund, SwedenZs. Podolyák#N#University of Surrey#N#P. H. ReganDepartment of Physics, University of Surrey, Guildford GU2 7XH, United KingdomE. Werner-MalentoIEP, Warsaw University, PL-00681 Warsaw, PolandP. DetistovFaculty of Physics, University of Sofia, BG-1164 Sofia, BulgariaS. LalkovskiSchool of Engineering, University of Brighton, Brighton BN2 4GJ, United KingdomV. ModamioDepartamento de Fsica Terica, Universidad Autnoma de Madrid, E-28049 Madrid, SpainJoel W. WalkerDepartamento de Fsica Terica, Universidad Autnoma de Madrid, E-28049 Madrid, SpainK. AndgrenKTH Stockholm, S-10691 Stockholm, SwedenP. BednarczykThe Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of SciencesJ. BenlliureUniversidade de Santiago de Compostela, E-15782 Santiago de Compostela, SpainG. BenzoniINFN, Universitdegli Studi di Milano and INFN sezione di Milano, I-20133 Milano, ItalyA. M. BruceSchool of Engineering, University of Brighton, Brighton BN2 4GJ, United KingdomE. CasarejosUniversidade de Santiago de Compostela, E-15782 Santiago de Compostela, SpainB. CederwallKTH Stockholm, S-10691 Stockholm, SwedenF. C. L. CrespiINFN, Universitdegli Studi di Milano and INFN sezione di Milano, I-20133 Milano, ItalyP. DoornenbalRIKENH. Geißel, CNRS/IN2P3, Institut National Polytechnique de Grenoble, F-38026 Grenoble Cedex, FranceJ. Gerl, CNRS/IN2P3, Institut National Polytechnique de Grenoble, F-38026 Grenoble Cedex, FranceJ. Gre ̧boszThe Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of SciencesB. HadiniaKTH Stockholm, S-10691 Stockholm, SwedenM. HellströmR. HoischenNuclear physicsG. IlieInstitut fr Kernphysik, Universitt zu Kln, D-50937 Kln, GermanyA. KhaplanovKTH Stockholm, S-10691 Stockholm, SwedenM. KmiecikThe Henryk Niewodniczaski Institute of Nuclear Physics, PAN, PL-31342 Krakw, PolandI. Kojouharov, CNRS/IN2P3, Institut National Polytechnique de Grenoble, F-38026 Grenoble Cedex, FranceR. KumarInter University Accelerator Centre, New Delhi, IndiaN. Kurz, CNRS/IN2P3, Institut National Polytechnique de Grenoble, F-38026 Grenoble Cedex, FranceA. MajThe Henryk Niewodniczaski Institute of Nuclear Physics, PAN, PL-31342 Krakw, PolandS. MandalUniversity of Delhi, New Delhi, IndiaF. Montes, CNRS/IN2P3, Institut National Polytechnique de Grenoble, F-38026 Grenoble Cedex, FranceG. Martı́nez-PinedoGSI Helmholtz Centre for Heavy Ion ResearchS. MyalskiThe Henryk Niewodniczaski Institute of Nuclear Physics, PAN, PL-31342 Krakw, PolandW. Prokopowicz, CNRS/IN2P3, Institut National Polytechnique de Grenoble, F-38026 Grenoble Cedex, FranceH. Schaffner, CNRS/IN2P3, Institut National Polytechnique de Grenoble, F-38026 Grenoble Cedex, FranceG. S. SimpsonLPSC, Universit Joseph Fourier GrenobleS. J. SteerDepartment of Physics, University of Surrey, Guildford GU2 7XH, United KingdomS. Tashenov, CNRS/IN2P3, Institut National Polytechnique de Grenoble, F-38026 Grenoble Cedex, FranceO. WielandINFN, Universitdegli Studi di Milano and INFN sezione di Milano, I-20133 Milano, ItalyH. J. Wollersheim, CNRS/IN2P3, Institut National Polytechnique de Grenoble, F-38026 Grenoble Cedex, France
ABI
Abstract
The $\ensuremath{\gamma}$-ray decay of isomeric states in the even-even nucleus $^{128}\mathrm{Cd}$ has been observed. The nucleus of interest was produced both by the fragmentation of $^{136}\mathrm{Xe}$ and the fission of $^{238}\mathrm{U}$ primary beams. The level scheme was unambiguously constructed based on $\ensuremath{\gamma}\ensuremath{\gamma}$ coincidence relations in conjunction with detailed lifetime analysis employed for the first time on this nucleus. Large-scale shell-model calculations, without consideration of excitations across the $N=82$ shell closure, were performed and provide a consistent description of the experimental level scheme. The structure of the isomeric states and their decays exhibit coexistence of proton, neutron, and strongly mixed configurations due to $\ensuremath{\pi}\ensuremath{\nu}$ interaction in overlapping orbitals for both proton and neutron holes.
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