Dissociation of ^8He(Coulomb dissociation,IAS,SHE)

DOI Web Site
  • 岩田 佳之
    放射線医学総合研究所
  • Ieki K.
    Department of Physics, Rikkyo University
  • Galonsky A.
    National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University
  • Kruse J.J.
    National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University:(Present office)Mayo Clinic
  • Wang J.
    National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University:(Present office)American Express Co.
  • Zecher P.D.
    National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University:(Present office)Deloitte & Touche Consulting Group
  • Deak F.
    Department of Atomic Physics, Eotvos University
  • Horvath A.
    Department of Atomic Physics, Eotvos University
  • Kiss A.
    Department of Atomic Physics, Eotvos University
  • Seres Z.
    KFKI Research Institute for Particle and Nuclear Physics of the Hungarian Academy of Sciences
  • Kolata J.J.
    Department of Physics, University of Notre Dame
  • Schwarzenberg J.von
    Department of Physics, University of Notre Dame
  • Warner R.E.
    Department of Physics, Oberlin College
  • Schelin H.
    Department of Physics, CEFET

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タイトル別名
  • Dissociation of 8He

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抄録

We have performed kinematically complete measurements of Coulomb dissociation of 24A MeV ^8He into ^6He and two neutrons. Momenta of incident beam particles and outgoing decay products from the ^8He dissociation were measured in coincidence. The two neutron removal cross sections were extracted from inclusive (^6He+n+X) and exclusive (^6He+2n) data sets. The cross sections from the two data sets differ by a factor of two. This discrepancy can be understood with an assumption of the sequential decay property in the ^8He dissociation. This assumption was further verified with the relative energy distribution of the ^6He+n system. The excitation energy of the ^8He can be reconstructed. The excitation spectrum for a Pb target shows broad structure indicating the E1 continuum state as observed in measurements of the other halo nuclei. The photonuclear cross section σ_<E1> and the dipole strength function dB(E1)/dE_d were deduced for the first time.

収録刊行物

  • 素粒子論研究

    素粒子論研究 102 (2), B39-B43, 2000

    素粒子論グループ 素粒子論研究 編集部

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