Particle-hole excitations in the interacting boson model (III): The O(6)-SU(3) coupling |
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| Institution: | 1. Institute for Theoretical Physics, Vakgroep Subatomaire en Stralingsfysica, Proeftuinstraat 86, B-9000 Gent, Belgium;2. School of Physics, Georgia Institute of Teçhnology, Atlanta, GA 30332-0430, USA;3. Institut de Physique, Université de Fribourg, Pérolles, CH-1700 Fribourg, Switzerland;1. ARC Centre of Excellence for Particle Physics at the Tera-scale, School of Chemistry and Physics, University of Adelaide, Adelaide SA 5005, Australia;2. Departament de Física Teòrica and IFIC, Universitat de València-CSIC, 46100, Burjassot, Spain;3. Institut für Kern- und Teilchenphysik, TU Dresden, Zellescher Weg 19, 01069 Dresden, Germany;4. Deutsches Elektronen-Synchrotron (DESY), 22607 Hamburg, Germany;1. Dpt. de Física de Partículas, Universidade de Santiago de Compostela, E-15782, Santiago de Compostela, Spain;2. School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom;3. Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany;4. GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany;5. Universidade de Vigo, E-36310 Vigo, Spain;6. Department of Physics, Lund University, SE 221 00 Lund, Sweden;7. ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany;8. Frankfurt Institute for Advanced Studies, D-60438 Frankfurt am Main, Germany;9. Centro de Fsica Nuclear da Universidade de Lisboa, 1649-003 Lisbon, Portugal;10. STFC Daresbury Laboratory, Warrington WA4 4AD, United Kingdom;11. Instituto de Estructura de la Materia CSIC, Madrid, Spain;1. Key Laboratory of Dependable Service Computing in Cyber Physical Society of Ministry of Education, Chongqing University, Chongqing 400044, China;2. College of Automation, Chongqing University, Chongqing 400044, China |
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| Abstract: | We apply the group theoretical concepts of the EIBM, an extension of the interacting boson model where a distinction is made between particle and hole bosons, to the particular situation of two coexisting systems in the same nucleus exhibiting the O(6) (regular states) and SU(3) (intruder states) symmetries. Besides giving evidence that such a coexisting set of states could well be applicable to the Pb region, we discuss the “global” symmetry properties of the above model. We also concentrate on mixing between the otherwise coexisting symmetries and point out how to make more realistic calculations. We discuss, at large, the experimental evidence in the Pb region for intruder analog multiplets. |
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