The structure of $^6$He studied by the proton inelastic scattering at 70 A MeV

ORAL

Abstract

Inelastic proton scattering of the neutron-rich helium isotope $^6$He has been studied in inverse kinematics at 70 MeV/nucleon. $^6$He is a loosely bound Borromean nucleus. It is thus interesting to study its nuclear response, such as the three-body related discrete resonance and the continuum. The experiment was performed at the RIKEN Accelerator Research Facility. Secondary beam of $^6$He was produced and separated by the RIKEN Projectile Fragment Separator (RIPS). $^6$He bombarded a liquid hydrogen target. The momentum vectors of all the outgoing particles, $^4$He and two neutrons, were determined event by event. $^4$He was bent by a dipole magnet and was detected with a plastic scintillator hodoscope and drift chambers. The neutrons were detected by two walls of scintillator hodoscope. In this talk, we present the invariant mass spectrum of $^6$He and discuss its structure.

–

Authors

  • Yoshiko Hashimoto

  • Takashi Nakamura

  • Yoshitero Satou

  • Yosuke Kondo

  • Takashi Sugimoto

  • Nobuyuki Matsui

  • Toshifumi Okumura

  • Takumi Nakabayashi

  • Mayuko Shinohara

    • Tokyo Institute of Technology

  • Toshio Kobayashi

  • Hideaki Otsu

  • Yohei Matsuda

  • Natsumi Endo

  • Mitsuhisa Kitayama

    • Tohoku University

  • Takeo Onishi

  • Hooijin Ong

    • Univ. of Tokyo

  • Susumu Shimoura

  • Mitsura Tamaki

    • Center for Nuclear Study, University of Tokyo

  • Yasuhiro Togano

  • Syoko Kawai

    • Rikkyo Univ.