Dissociation of 8He (不安定核の構造と反応)

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概要

• 論文の詳細を見る

• 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.

• 素粒子論グループ 素粒子研究編集部の論文
• 2000-11-20

著者

• 岩田 佳之

  放射線医学総合研究所

• Kolata J.j.

  Department Of Physics University Of Notre Dame

• Kiss A.

  Department Of Physics Tohoku University

• Galonsky A.

  National Superconducting Cyclotron Laboratory And Department Of Physics And Astronomy Michigan State

• Wang J.

  National Dong Hwa University

• Ieki K.

  Department of Physics, Rikkyo University

• Kruse J.J.

  National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan Stat

• Zecher P.D.

  National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan Stat

• Deak F.

  Department of Atomic Physics, Eotvos University

• Horvath A.

  Department of Atomic Physics, Eotvos University

• Seres Z.

  KFKI Research Institute for Particle and Nuclear Physics of the Hungarian Academy of Sciences

• Schwarzenberg J.von

  Department of Physics, University of Notre Dame

• Warner R.E.

  Department of Physics, Oberlin College

• Schelin H.

  Department of Physics, CEFET

• Warner R.e.

  Department Of Physics Oberlin College

• Kiss A.

  Department Of Atomic Physics Eotvos University

• Deak F.

  Department Of Atomic Physics Eotvos University

• Seres Z.

  Kfki Res.ins.

• Kruse J.j.

  National Superconducting Cyclotron Laboratory And Department Of Physics And Astronomy Michigan State

• Schelin H.

  Department Of Physics Cefet

• Zecher P.d.

  National Superconducting Cyclotron Laboratory And Department Of Physics And Astronomy Michigan State

• Schwarzenberg J.von

  Department Of Physics University Of Notre Dame

• Horvath A.

  Department Of Atomic Physics Eotvos University

• Ieki K.

  Department Of Physics Rikkyo University

• Ieki K.

  Department Of Physics Rikkyo Univ.

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