One-neutron knockout of 23O

  • D. Cortina-Gil
  • J. Fernandez-Vazquez
  • T. Aumann
  • T. Baumann
  • J. Benlliure
  • M. J. G. Borge
  • L. V. Chulkov
  • U. Datta Pramanik
  • C. Forssén
  • L. M. Fraile
  • H. Geissel
  • J. Gerl
  • F. Hammache
  • K. Itahashi
  • R. Janik
  • B. Jonson
  • S. Mandal
  • K. Markenroth
  • M. Meister
  • M. Mocko
  • G. Münzenberg
  • T. Ohtsubo
  • A. Ozawa
  • Y. Prezado
  • V. Pribora
  • K. Riisager
  • H. Scheit
  • R. Schneider
  • G. Schrieder
  • H. Simon
  • B. Sitar
  • A. Stolz
  • P. Strmen
  • K. Sümmerer
  • I. Szarka
  • H. Weick
ENAM 2004

Abstract.

Breakup reactions were used to study the ground-state configuration of the neutron-rich isotope 23O. The 22O fragments produced in one-nucleon removal from 23O at 938 MeV/nucleon in a carbon target were detected in coincidence with de-exciting γ rays, allowing to discern between 22O ground-state and excited-states contributions. From the comparison of exclusive experimental momentum distributions for the one-neutron removal channel to theoretical momentum distributions calculated in an Eikonal model for the knockout process, and spin and parity assignment of Iπ = 1/2+ was deduced for the 23O ground state. This result solved the existent experimental discrepancy.

PACS.

25.60.Gc Breakup and momentum distributions 25.60.Dz Interaction and reaction cross-sections 27.20.+n 6 ⩽ A ⩽ 19 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2005

Authors and Affiliations

  • D. Cortina-Gil
    • 1
  • J. Fernandez-Vazquez
    • 1
  • T. Aumann
    • 2
  • T. Baumann
    • 3
  • J. Benlliure
    • 1
  • M. J. G. Borge
    • 4
  • L. V. Chulkov
    • 5
  • U. Datta Pramanik
    • 2
  • C. Forssén
    • 6
  • L. M. Fraile
    • 4
  • H. Geissel
    • 2
  • J. Gerl
    • 2
  • F. Hammache
    • 2
  • K. Itahashi
    • 7
  • R. Janik
    • 8
  • B. Jonson
    • 6
  • S. Mandal
    • 2
  • K. Markenroth
    • 6
  • M. Meister
    • 6
  • M. Mocko
    • 8
  • G. Münzenberg
    • 2
  • T. Ohtsubo
    • 2
  • A. Ozawa
    • 9
  • Y. Prezado
    • 4
  • V. Pribora
    • 5
  • K. Riisager
    • 10
  • H. Scheit
    • 11
  • R. Schneider
    • 12
  • G. Schrieder
    • 13
  • H. Simon
    • 13
  • B. Sitar
    • 8
  • A. Stolz
    • 12
  • P. Strmen
    • 8
  • K. Sümmerer
    • 2
  • I. Szarka
    • 8
  • H. Weick
    • 2
  1. 1.Universidad de Santiago de CompostelaSantiago de CompostelaSpain
  2. 2.Gesellschaft für Schwerionenforschung (GSI)DarmstadtGermany
  3. 3.NSCLMichigan State UniversityEast LansingUSA
  4. 4.Instituto de Estructura de la MateriaCSICMadridSpain
  5. 5.Kurchatov InstituteMoscowRussia
  6. 6.Avd. för Experimentell FysikChalmers Tekniska Högskola och Göteborgs UniversitetGöteborgSweden
  7. 7.Department of PhysicsUniversity of TokyoTokyoJapan
  8. 8.Faculty of Mathematics and PhysicsComenius UniversityBratislavaSlovakia
  9. 9.RIKENSaitamaJapan
  10. 10.Institut for Fysik og AstronomiAarhus UniversitetAarhus CDenmark
  11. 11.Max-Planck Institut für KernphysikHeidelbergGermany
  12. 12.Physik-Deptartment E12Technische Universität, MünchenGarchingGermany
  13. 13.Institut für KernphysikTechnische UniversitätDarmstadtGermany

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