Physics Letters B (Dec 2020)
Systematic reduction of the proton-removal cross section in neutron-rich medium-mass nuclei
- J. Díaz-Cortés,
- J. Benlliure,
- J.L. Rodríguez-Sánchez,
- H. Álvarez-Pol,
- T. Aumann,
- C.A. Bertulani,
- B. Blank,
- E. Casarejos,
- D. Cortina-Gil,
- D. Dragosavac,
- V. Föhr,
- A. Gargano,
- M. Gascón,
- W. Gawlikowicz,
- A. Heinz,
- K. Helariutta,
- A. Kelić-Heil,
- S. Lukić,
- F. Montes,
- D. Pérez-Loureiro,
- L. Pieńkowski,
- K.-H. Schmidt,
- M. Staniou,
- K. Subotić,
- K. Sümmerer,
- J. Taieb,
- A. Trzcińska
Affiliations
- J. Díaz-Cortés
- IGFAE, Universidade de Santiago de Compostela, E-15782, Spain
- J. Benlliure
- IGFAE, Universidade de Santiago de Compostela, E-15782, Spain; Corresponding author.
- J.L. Rodríguez-Sánchez
- IGFAE, Universidade de Santiago de Compostela, E-15782, Spain
- H. Álvarez-Pol
- IGFAE, Universidade de Santiago de Compostela, E-15782, Spain
- T. Aumann
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- C.A. Bertulani
- Texas A&M University-Commerce, 75428 Commerce, TX, United States of America
- B. Blank
- Centre d'Etudes Nucleaires, F-33175 Bordeaux-Gradignan Cedex, France
- E. Casarejos
- University of Vigo, E-36200 Vigo, Spain
- D. Cortina-Gil
- IGFAE, Universidade de Santiago de Compostela, E-15782, Spain
- D. Dragosavac
- IGFAE, Universidade de Santiago de Compostela, E-15782, Spain
- V. Föhr
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
- A. Gargano
- Istituto Nazionale di Fisica Nucleare, Complesso Universitario di Monte S. Angelo, Via Cintia, I-80126 Napoli, Italy
- M. Gascón
- IGFAE, Universidade de Santiago de Compostela, E-15782, Spain
- W. Gawlikowicz
- Cardinal Stefan Wyszynski University, PL-01-938 Warsaw, Poland
- A. Heinz
- Chalmers University of Technology, SE-41296 Gothenburg, Sweden
- K. Helariutta
- University of Helsinki, FI-00014 Helsinki, Finland
- A. Kelić-Heil
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
- S. Lukić
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
- F. Montes
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
- D. Pérez-Loureiro
- IGFAE, Universidade de Santiago de Compostela, E-15782, Spain
- L. Pieńkowski
- Heavy Ion Laboratory, University of Warsaw, PL-02-093 Warsaw, Poland
- K.-H. Schmidt
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
- M. Staniou
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
- K. Subotić
- Institute of Nuclear Sciences Vinča, University of Belgrade, 11001 Belgrade, Serbia
- K. Sümmerer
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
- J. Taieb
- CEA, DAM, DIF, F-91297 Arpajon, France
- A. Trzcińska
- Heavy Ion Laboratory, University of Warsaw, PL-02-093 Warsaw, Poland
- Journal volume & issue
-
Vol. 811
p. 135962
Abstract
Single-neutron and single-proton removal cross sections have been measured for medium-mass neutron-rich nuclei around Z=50 and energies around 1000A MeV using the FRagment Separator (FRS) at GSI. The measured cross sections confirm the relative low values of the proton-removal cross sections, observed since a long time ago and not yet understood. Model calculations considering the knock-out process together with initial- and final-state interactions describe the measured neutron-removal cross sections. Proton-removal cross sections are, however, significantly over-predicted by the same calculations. The observed difference can be explained to a large extent by the knock-out of short-range correlated nucleons from dominant neutron-proton pairs in neutron-rich nuclei.
