Quasifree (p, 2p) Reactions on Oxygen Isotopes: Observation of Isospin Independence of the Reduced Single-Particle Strength

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Quasifree one-proton knockout reactions have been employed in inverse kinematics for a systematic study of the structure of stable and exotic oxygen isotopes at the R3B/LAND setup with incident beam energies in the range of 300-450 MeV/u. The oxygen isotopic chain offers a large variation of separation energies that allows for a quantitative understanding of single-particle strength with changing isospin asymmetry. Quasifree knockout reactions provide a complementary approach to intermediate-energy one-nucleon removal reactions. Inclusive cross sections for quasifree knockout reactions of the type OA(p,2p)NA-1 have been determined and compared to calculations based on the eikonal reaction theory. The reduction factors for the single-particle strength with respect to the independent-particle model were obtained and compared to state-of-the-art ab initio predictions. The results do not show any significant dependence on proton-neutron asymmetry.


  • L. Atar
  • S. Paschalis
  • C. Barbieri
  • C. A. Bertulani
  • P. Díaz Fernández
  • M. Holl
  • M. A. Najafi
  • V. Panin
  • H. Alvarez-Pol
  • T. Aumann
  • V. Avdeichikov
  • S. Beceiro-Novo
  • D. Bemmerer
  • J. Benlliure
  • J. M. Boillos
  • K. Boretzky
  • M. J.G. Borge
  • M. Caamaño
  • C. Caesar
  • E. Casarejos
  • W. Catford
  • J. Cederkall
  • M. Chartier
  • L. Chulkov
  • D. Cortina-Gil
  • E. Cravo
  • R. Crespo
  • I. Dillmann
  • Z. Elekes
  • J. Enders
  • O. Ershova
  • A. Estrade
  • F. Farinon
  • L. M. Fraile
  • M. Freer
  • D. Galaviz Redondo
  • H. Geissel
  • R. Gernhäuser
  • P. Golubev
  • K. Göbel
  • J. Hagdahl
  • T. Heftrich
  • M. Heil
  • M. Heine
  • A. Heinz
  • A. Henriques
  • A. Hufnagel
  • A. Ignatov
  • H. T. Johansson
  • A. Knyazev
  • R3B Collaboration
Enheter & grupper
Externa organisationer
  • Texas A and M University
  • University of Vigo
  • MTA Atomki
  • Complutense University of Madrid
  • University of Strasbourg
  • University of Santiago de Compostela
  • Technical University of Darmstadt
  • GSI Helmholtz Centre for Heavy Ion Research
  • University of York
  • University of Surrey
  • University of Groningen
  • RIKEN Nishina Center for Accelerator-Based Science
  • Helmholtz-Zentrum Dresden-Rossendorf
  • CSIC Instituto de Estructura de la Materia (IEM)
  • University of Liverpool
  • Russian Research Center 'Kurchatov Institute'
  • University of Lisbon
  • Justus Liebig University Giessen
  • University of Edinburgh
  • University of Birmingham
  • Technical University of Munich
  • Goethe University
  • Chalmers Tekniska Högskola

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Subatomär fysik
TidskriftPhysical Review Letters
Utgåva nummer5
StatusPublished - 2018 jan 29
Peer review utfördJa