Core excitations across the neutron shell gap in 207Tl
The single closed-neutron-shell, one proton–hole nucleus 207Tl was populated in deep-inelastic collisions of a 208Pb beam with a 208Pb target. The yrast and near-yrast level scheme has been established up to high excitation energy, comprising an octupole phonon state and a large number of core excit...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2015-07-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269315003093 |
| _version_ | 1819231980710002688 |
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| author | E. Wilson Zs. Podolyák H. Grawe B.A. Brown C.J. Chiara S. Zhu B. Fornal R.V.F. Janssens C.M. Shand M. Bowry M. Bunce M.P. Carpenter N. Cieplicka-Oryńczak A.Y. Deo G.D. Dracoulis C.R. Hoffman R.S. Kempley F.G. Kondev G.J. Lane T. Lauritsen G. Lotay M.W. Reed P.H. Regan C. Rodríguez Triguero D. Seweryniak B. Szpak P.M. Walker |
| author_facet | E. Wilson Zs. Podolyák H. Grawe B.A. Brown C.J. Chiara S. Zhu B. Fornal R.V.F. Janssens C.M. Shand M. Bowry M. Bunce M.P. Carpenter N. Cieplicka-Oryńczak A.Y. Deo G.D. Dracoulis C.R. Hoffman R.S. Kempley F.G. Kondev G.J. Lane T. Lauritsen G. Lotay M.W. Reed P.H. Regan C. Rodríguez Triguero D. Seweryniak B. Szpak P.M. Walker |
| author_sort | E. Wilson |
| collection | DOAJ |
| description | The single closed-neutron-shell, one proton–hole nucleus 207Tl was populated in deep-inelastic collisions of a 208Pb beam with a 208Pb target. The yrast and near-yrast level scheme has been established up to high excitation energy, comprising an octupole phonon state and a large number of core excited states. Based on shell-model calculations, all observed single core excitations were established to arise from the breaking of the N=126 neutron core. While the shell-model calculations correctly predict the ordering of these states, their energies are compressed at high spins. It is concluded that this compression is an intrinsic feature of shell-model calculations using two-body matrix elements developed for the description of two-body states, and that multiple core excitations need to be considered in order to accurately calculate the energy spacings of the predominantly three-quasiparticle states. |
| first_indexed | 2024-12-23T11:53:35Z |
| format | Article |
| id | doaj.art-37557363a3c745e783df75ffa158711a |
| institution | Directory Open Access Journal |
| issn | 0370-2693 1873-2445 |
| language | English |
| last_indexed | 2024-12-23T11:53:35Z |
| publishDate | 2015-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-37557363a3c745e783df75ffa158711a2022-12-21T17:48:09ZengElsevierPhysics Letters B0370-26931873-24452015-07-01747C889210.1016/j.physletb.2015.04.055Core excitations across the neutron shell gap in 207TlE. Wilson0Zs. Podolyák1H. Grawe2B.A. Brown3C.J. Chiara4S. Zhu5B. Fornal6R.V.F. Janssens7C.M. Shand8M. Bowry9M. Bunce10M.P. Carpenter11N. Cieplicka-Oryńczak12A.Y. Deo13G.D. Dracoulis14C.R. Hoffman15R.S. Kempley16F.G. Kondev17G.J. Lane18T. Lauritsen19G. Lotay20M.W. Reed21P.H. Regan22C. Rodríguez Triguero23D. Seweryniak24B. Szpak25P.M. Walker26Department of Physics, University of Surrey, Guildford, GU2 7XH, UKDepartment of Physics, University of Surrey, Guildford, GU2 7XH, UKGSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, GermanyDepartment of Physics and Astronomy and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824-1321, USADepartment of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, USAPhysics Division, Argonne National Laboratory, Argonne, IL 60439, USAH. Niewodniczański Institute of Nuclear Physics, PL-31342 Kraków, PolandPhysics Division, Argonne National Laboratory, Argonne, IL 60439, USADepartment of Physics, University of Surrey, Guildford, GU2 7XH, UKDepartment of Physics, University of Surrey, Guildford, GU2 7XH, UKDepartment of Physics, University of Surrey, Guildford, GU2 7XH, UKPhysics Division, Argonne National Laboratory, Argonne, IL 60439, USAH. Niewodniczański Institute of Nuclear Physics, PL-31342 Kraków, PolandDepartment of Physics, University of Massachusetts Lowell, Lowell, MA 01854, USADepartment of Nuclear Physics, Research School of Physics and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, AustraliaPhysics Division, Argonne National Laboratory, Argonne, IL 60439, USADepartment of Physics, University of Surrey, Guildford, GU2 7XH, UKNuclear Engineering Division, Argonne National Laboratory, Argonne, IL 60439, USADepartment of Nuclear Physics, Research School of Physics and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, AustraliaPhysics Division, Argonne National Laboratory, Argonne, IL 60439, USADepartment of Physics, University of Surrey, Guildford, GU2 7XH, UKDepartment of Physics, University of Surrey, Guildford, GU2 7XH, UKDepartment of Physics, University of Surrey, Guildford, GU2 7XH, UKSchool of Computing, Engineering and Mathematics, University of Brighton, Brighton, BN2 4GL, UKPhysics Division, Argonne National Laboratory, Argonne, IL 60439, USAH. Niewodniczański Institute of Nuclear Physics, PL-31342 Kraków, PolandDepartment of Physics, University of Surrey, Guildford, GU2 7XH, UKThe single closed-neutron-shell, one proton–hole nucleus 207Tl was populated in deep-inelastic collisions of a 208Pb beam with a 208Pb target. The yrast and near-yrast level scheme has been established up to high excitation energy, comprising an octupole phonon state and a large number of core excited states. Based on shell-model calculations, all observed single core excitations were established to arise from the breaking of the N=126 neutron core. While the shell-model calculations correctly predict the ordering of these states, their energies are compressed at high spins. It is concluded that this compression is an intrinsic feature of shell-model calculations using two-body matrix elements developed for the description of two-body states, and that multiple core excitations need to be considered in order to accurately calculate the energy spacings of the predominantly three-quasiparticle states.http://www.sciencedirect.com/science/article/pii/S0370269315003093 |
| spellingShingle | E. Wilson Zs. Podolyák H. Grawe B.A. Brown C.J. Chiara S. Zhu B. Fornal R.V.F. Janssens C.M. Shand M. Bowry M. Bunce M.P. Carpenter N. Cieplicka-Oryńczak A.Y. Deo G.D. Dracoulis C.R. Hoffman R.S. Kempley F.G. Kondev G.J. Lane T. Lauritsen G. Lotay M.W. Reed P.H. Regan C. Rodríguez Triguero D. Seweryniak B. Szpak P.M. Walker Core excitations across the neutron shell gap in 207Tl Physics Letters B |
| title | Core excitations across the neutron shell gap in 207Tl |
| title_full | Core excitations across the neutron shell gap in 207Tl |
| title_fullStr | Core excitations across the neutron shell gap in 207Tl |
| title_full_unstemmed | Core excitations across the neutron shell gap in 207Tl |
| title_short | Core excitations across the neutron shell gap in 207Tl |
| title_sort | core excitations across the neutron shell gap in 207tl |
| url | http://www.sciencedirect.com/science/article/pii/S0370269315003093 |
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