RIBF Research Division

Research Facility Development Division

Accelerator Applications Research Group

Subnuclear System Research Division

Directly under the Nishina Center

Closed Laboratory

Rare RI-Ring Team

Laboratory Head
Tetsuya ONISHID.Sci.
  • 1984年北海道大学理学部卒業
  • 1990年広島大学大学院理学研究科物理学専攻修了
  • 1991年理化学研究所基礎科学特別研究員
  • 1992年理化学研究所サイクロトロン研究室研究員
  • 2008年仁科加速器研究センター実験装置開発室長

Research Areas

We are developing the isochronous storage ring to measure the mass for rare radioactive isotopes (Rare RI ring). It is assumed that uranium is synthesized by neutron capture process after the supernovae explosion (r-process). To prove r-process, mass measurements for the rare RI is indispensable. It is possible to inject the rare RI one by one to the ring (individual injection) since cyclotrons in RIBF provide continuous beams. The isochronous storage ring and the individual injection are very unique system.

Research Subject

  1. Developments of isochronous storage ring to measure mass of rare RI

List of Selected Publications

  1. Y. Yamaguchi et al.:
    "Fast-kicker system for Rare-RI Ring"
    Phys. Scr. T166 (2015) 014056.
  2. Y. Abe et al.:
    "Isochronous field study of the Rare-RI Ring"
    Phys. Scr. T166 (2015) 014047.
  3. P. Shuai, et al.:
    "Charge and frequency resolved isochronous mass spectrometry and the mass of 51Co"
    Physics letter B 735 (2014) 327-331
  4. T. Yamaguchi et al.:
    "Performance of high-resolution position-sensitive detectors developed for storage-ring decay experiments"
    Nucl. Instrum. Methods Phys. Res. B 317 (2013) 697-700.
  5. F. Suzaki et al.:
    "Design study of a resonant Schottky pick-up for the Rare-RI Ring project"
    Nucl. Instrum. Methods Phys. Res. B 317 (2013) 636-639.
  6. D. Nagae et al.:
    "Time-of-flight detector applied to mass measurements in Rare-RI Ring"
    Nucl. Instrum. Methods Phys. Res. B 317 (2013) 640-643.
  7. Y, Yamaguchi et al.:
    "Construction of rare-RI ring at RIKEN RI Beam Factory"
    Nucl. Instrum. Methods Phys. Res. B 317 (2013) 629-635.
  8. T. Yamaguchi et al.:
    "The challenge of precision mass measurements of short-lived exotic nuclei: Development of a new storage-ring mass spectrometry"
    Int. J. Mass Spectrom. 349-350 (2013) 240-246.
  9. D. Shubina et al.:
    "Schottky mass measurements of heavy neutron-rich nuclides in the element range 70<=Z<=79 at the GSI Experimental Storage Ring"
    Phys. Rev. C 88 (2013) 024310/1-9.