Quasi-free neutron and proton knockout reactions from light nuclei in a wide neutron-to-proton asymmetry range
The quasi-free scattering reactions 11C(p,2p) and 10,11,12C(p,pn) have been studied in inverse kinematics at beam energies of 300–400 MeV/u at the R3B-LAND setup. The outgoing proton-proton and proton-neutron pairs were detected in coincidence with the reaction fragments in kinematically complete me...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2019-08-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269319304666 |
| _version_ | 1818502252107661312 |
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| author | M. Holl V. Panin H. Alvarez-Pol L. Atar T. Aumann S. Beceiro-Novo J. Benlliure C.A. Bertulani J.M. Boillos K. Boretzky M. Caamaño C. Caesar E. Casarejos W. Catford J. Cederkall L. Chulkov D. Cortina-Gil E. Cravo I. Dillmann P. Díaz Fernández Z. Elekes J. Enders L.M. Fraile D. Galaviz Redondo R. Gernhäuser P. Golubev T. Heftrich M. Heil M. Heine A. Heinz A. Henriques H.T. Johansson B. Jonson N. Kalantar-Nayestanaki R. Kanungo A. Kelic-Heil T. Kröll N. Kurz C. Langer T. Le Bleis S. Lindberg J. Machado E. Nacher M.A. Najafi T. Nilsson C. Nociforo S. Paschalis M. Petri R. Reifarth G. Ribeiro C. Rigollet D.M. Rossi D. Savran H. Scheit H. Simon O. Sorlin I. Syndikus O. Tengblad Y. Togano M. Vandebrouck P. Velho F. Wamers H. Weick C. Wheldon G.L. Wilson J.S. Winfield P. Woods M. Zhukov K. Zuber |
| author_facet | M. Holl V. Panin H. Alvarez-Pol L. Atar T. Aumann S. Beceiro-Novo J. Benlliure C.A. Bertulani J.M. Boillos K. Boretzky M. Caamaño C. Caesar E. Casarejos W. Catford J. Cederkall L. Chulkov D. Cortina-Gil E. Cravo I. Dillmann P. Díaz Fernández Z. Elekes J. Enders L.M. Fraile D. Galaviz Redondo R. Gernhäuser P. Golubev T. Heftrich M. Heil M. Heine A. Heinz A. Henriques H.T. Johansson B. Jonson N. Kalantar-Nayestanaki R. Kanungo A. Kelic-Heil T. Kröll N. Kurz C. Langer T. Le Bleis S. Lindberg J. Machado E. Nacher M.A. Najafi T. Nilsson C. Nociforo S. Paschalis M. Petri R. Reifarth G. Ribeiro C. Rigollet D.M. Rossi D. Savran H. Scheit H. Simon O. Sorlin I. Syndikus O. Tengblad Y. Togano M. Vandebrouck P. Velho F. Wamers H. Weick C. Wheldon G.L. Wilson J.S. Winfield P. Woods M. Zhukov K. Zuber |
| author_sort | M. Holl |
| collection | DOAJ |
| description | The quasi-free scattering reactions 11C(p,2p) and 10,11,12C(p,pn) have been studied in inverse kinematics at beam energies of 300–400 MeV/u at the R3B-LAND setup. The outgoing proton-proton and proton-neutron pairs were detected in coincidence with the reaction fragments in kinematically complete measurements. The efficiency to detect these pairs has been obtained from GEANT4 simulations which were tested using the 12C(p,2p) and 12C(p,pn) reactions. Experimental cross sections and momentum distributions have been obtained and compared to DWIA calculations based on eikonal theory. The new results reported here are combined with previously published cross sections for quasi-free scattering from oxygen and nitrogen isotopes and together they enable a systematic study of the reduction of single-particle strength compared to predictions of the shell model over a wide neutron-to-proton asymmetry range. The combined reduction factors show a weak or no dependence on isospin asymmetry, in contrast to the strong dependency reported in nucleon-removal reactions induced by nuclear targets at lower energies. However, the reduction factors for (p,2p) are found to be 'significantly smaller than for (p,pn) reactions for all investigated nuclei. Keywords: Quasi-free scattering, Inverse kinematics, Shell model, Spectroscopic factors |
| first_indexed | 2024-12-10T21:07:29Z |
| format | Article |
| id | doaj.art-e13e640110b049918b28b40b90101e8e |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-10T21:07:29Z |
| publishDate | 2019-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-e13e640110b049918b28b40b90101e8e2022-12-22T01:33:35ZengElsevierPhysics Letters B0370-26932019-08-01795682688Quasi-free neutron and proton knockout reactions from light nuclei in a wide neutron-to-proton asymmetry rangeM. Holl0V. Panin1H. Alvarez-Pol2L. Atar3T. Aumann4S. Beceiro-Novo5J. Benlliure6C.A. Bertulani7J.M. Boillos8K. Boretzky9M. Caamaño10C. Caesar11E. Casarejos12W. Catford13J. Cederkall14L. Chulkov15D. Cortina-Gil16E. Cravo17I. Dillmann18P. Díaz Fernández19Z. Elekes20J. Enders21L.M. Fraile22D. Galaviz Redondo23R. Gernhäuser24P. Golubev25T. Heftrich26M. Heil27M. Heine28A. Heinz29A. Henriques30H.T. Johansson31B. Jonson32N. Kalantar-Nayestanaki33R. Kanungo34A. Kelic-Heil35T. Kröll36N. Kurz37C. Langer38T. Le Bleis39S. Lindberg40J. Machado41E. Nacher42M.A. Najafi43T. Nilsson44C. Nociforo45S. Paschalis46M. Petri47R. Reifarth48G. Ribeiro49C. Rigollet50D.M. Rossi51D. Savran52H. Scheit53H. Simon54O. Sorlin55I. Syndikus56O. Tengblad57Y. Togano58M. Vandebrouck59P. Velho60F. Wamers61H. Weick62C. Wheldon63G.L. Wilson64J.S. Winfield65P. Woods66M. Zhukov67K. Zuber68Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany; GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany; Saint Mary's University, B3H 3C3 Halifax, Nova Scotia, Canada; TRIUMF, V6T 2A3 Vancouver, British Columbia, Canada; Corresponding author.Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany; RIKEN, Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, 351-0198 Wako, Saitama, JapanIGFAE, Instituto Galego de Física de Altas Enerxías, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, SpainInstitut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, GermanyInstitut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany; GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, GermanyIGFAE, Instituto Galego de Física de Altas Enerxías, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, SpainIGFAE, Instituto Galego de Física de Altas Enerxías, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, SpainTexas A&M University-Commerce, 75428 Commerce, TX, United States of AmericaIGFAE, Instituto Galego de Física de Altas Enerxías, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, SpainGSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, GermanyIGFAE, Instituto Galego de Física de Altas Enerxías, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, SpainInstitut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany; GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, GermanyUniversidad de Vigo, 36310 Vigo, SpainUniversity of Surrey, Surrey GU2 7XH, United KingdomDepartment of Physics, Lund University, 22100 Lund, SwedenNRC Kurchatov Institute, pl. Akademika Kurchatova, Moscow 123182, RussiaIGFAE, Instituto Galego de Física de Altas Enerxías, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, SpainCFTC, Faculdade de Ciencias, University of Lisbon, 1749-016 Lisbon, PortugalGSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany; Justus-Liebig-Universität Gießen, 35392 Gießen, GermanyInstitutionen för Fysik, Chalmers Tekniska Högskola, S-412 96 Göteborg, Sweden; IGFAE, Instituto Galego de Física de Altas Enerxías, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, SpainATOMKI Debrecen, Bem tér 18/c, 4026 Debrecen, HungaryInstitut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, GermanyGrupo de Física Nuclear & IPARCOS, Universidad Complutense de Madrid, 28040 Madrid, SpainLaboratory for Instrumentation and Experimental Particle Physics, LIP, 1649-003 Lisbon, Portugal; Physics Department of the Faculty of Sciences, University of Lisbon, 1749-016 Lisbon, PortugalTechnische Universität München, 85748 Garching, GermanyDepartment of Physics, Lund University, 22100 Lund, SwedenGoethe-Universität Frankfurt, 60438 Frankfurt am Main, GermanyGSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, GermanyIPHC-CNRS/Université de Strasbourg, 67037 Strasbourg, FranceInstitutionen för Fysik, Chalmers Tekniska Högskola, S-412 96 Göteborg, SwedenLaboratory for Instrumentation and Experimental Particle Physics, LIP, 1649-003 Lisbon, PortugalInstitutionen för Fysik, Chalmers Tekniska Högskola, S-412 96 Göteborg, SwedenInstitutionen för Fysik, Chalmers Tekniska Högskola, S-412 96 Göteborg, SwedenKVI-CART, University of Groningen, 9747 AA Groningen, NetherlandsSaint Mary's University, B3H 3C3 Halifax, Nova Scotia, Canada; TRIUMF, V6T 2A3 Vancouver, British Columbia, CanadaGSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, GermanyInstitut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, GermanyGSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, GermanyGoethe-Universität Frankfurt, 60438 Frankfurt am Main, GermanyTechnische Universität München, 85748 Garching, GermanyInstitutionen för Fysik, Chalmers Tekniska Högskola, S-412 96 Göteborg, SwedenLIBPhys-UNL, FCT, Universidade Nova de Lisboa, 2829-516 Caparica, PortugalInstituto de Estructura de la Materia, CSIC, E-28006 Madrid, SpainKVI-CART, University of Groningen, 9747 AA Groningen, NetherlandsInstitutionen för Fysik, Chalmers Tekniska Högskola, S-412 96 Göteborg, SwedenGSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, GermanyInstitut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany; Department of Physics, University of York, York YO10 5DD, United KingdomInstitut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany; Department of Physics, University of York, York YO10 5DD, United KingdomGoethe-Universität Frankfurt, 60438 Frankfurt am Main, GermanyInstituto de Estructura de la Materia, CSIC, E-28006 Madrid, SpainKVI-CART, University of Groningen, 9747 AA Groningen, NetherlandsInstitut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany; GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, GermanyExtreMe Matter Institute, GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, GermanyInstitut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, GermanyGSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, GermanyGANIL, Boulevard Henri Becquerel, 14076 Caen, FranceInstitut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, GermanyInstituto de Estructura de la Materia, CSIC, E-28006 Madrid, SpainRIKEN, Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, 351-0198 Wako, Saitama, JapanGANIL, Boulevard Henri Becquerel, 14076 Caen, FranceLaboratory for Instrumentation and Experimental Particle Physics, LIP, 1649-003 Lisbon, PortugalInstitut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany; GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, GermanyGSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, GermanyUniversity of Birmingham, Birmingham B15 2TT, United KingdomUniversity of Surrey, Surrey GU2 7XH, United KingdomGSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, GermanyUniversity of Edinburgh, Edinburgh EH8 9YL, United KingdomInstitutionen för Fysik, Chalmers Tekniska Högskola, S-412 96 Göteborg, SwedenTechnische Universität Dresden, Institut für Kern- und Teilchenphysik, 01069 Dresden, Germany; ATOMKI Debrecen, Bem tér 18/c, 4026 Debrecen, HungaryThe quasi-free scattering reactions 11C(p,2p) and 10,11,12C(p,pn) have been studied in inverse kinematics at beam energies of 300–400 MeV/u at the R3B-LAND setup. The outgoing proton-proton and proton-neutron pairs were detected in coincidence with the reaction fragments in kinematically complete measurements. The efficiency to detect these pairs has been obtained from GEANT4 simulations which were tested using the 12C(p,2p) and 12C(p,pn) reactions. Experimental cross sections and momentum distributions have been obtained and compared to DWIA calculations based on eikonal theory. The new results reported here are combined with previously published cross sections for quasi-free scattering from oxygen and nitrogen isotopes and together they enable a systematic study of the reduction of single-particle strength compared to predictions of the shell model over a wide neutron-to-proton asymmetry range. The combined reduction factors show a weak or no dependence on isospin asymmetry, in contrast to the strong dependency reported in nucleon-removal reactions induced by nuclear targets at lower energies. However, the reduction factors for (p,2p) are found to be 'significantly smaller than for (p,pn) reactions for all investigated nuclei. Keywords: Quasi-free scattering, Inverse kinematics, Shell model, Spectroscopic factorshttp://www.sciencedirect.com/science/article/pii/S0370269319304666 |
| spellingShingle | M. Holl V. Panin H. Alvarez-Pol L. Atar T. Aumann S. Beceiro-Novo J. Benlliure C.A. Bertulani J.M. Boillos K. Boretzky M. Caamaño C. Caesar E. Casarejos W. Catford J. Cederkall L. Chulkov D. Cortina-Gil E. Cravo I. Dillmann P. Díaz Fernández Z. Elekes J. Enders L.M. Fraile D. Galaviz Redondo R. Gernhäuser P. Golubev T. Heftrich M. Heil M. Heine A. Heinz A. Henriques H.T. Johansson B. Jonson N. Kalantar-Nayestanaki R. Kanungo A. Kelic-Heil T. Kröll N. Kurz C. Langer T. Le Bleis S. Lindberg J. Machado E. Nacher M.A. Najafi T. Nilsson C. Nociforo S. Paschalis M. Petri R. Reifarth G. Ribeiro C. Rigollet D.M. Rossi D. Savran H. Scheit H. Simon O. Sorlin I. Syndikus O. Tengblad Y. Togano M. Vandebrouck P. Velho F. Wamers H. Weick C. Wheldon G.L. Wilson J.S. Winfield P. Woods M. Zhukov K. Zuber Quasi-free neutron and proton knockout reactions from light nuclei in a wide neutron-to-proton asymmetry range Physics Letters B |
| title | Quasi-free neutron and proton knockout reactions from light nuclei in a wide neutron-to-proton asymmetry range |
| title_full | Quasi-free neutron and proton knockout reactions from light nuclei in a wide neutron-to-proton asymmetry range |
| title_fullStr | Quasi-free neutron and proton knockout reactions from light nuclei in a wide neutron-to-proton asymmetry range |
| title_full_unstemmed | Quasi-free neutron and proton knockout reactions from light nuclei in a wide neutron-to-proton asymmetry range |
| title_short | Quasi-free neutron and proton knockout reactions from light nuclei in a wide neutron-to-proton asymmetry range |
| title_sort | quasi free neutron and proton knockout reactions from light nuclei in a wide neutron to proton asymmetry range |
| url | http://www.sciencedirect.com/science/article/pii/S0370269319304666 |
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