Rare RI-ring Team

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 Subjects

• Developments of isochronous storage ring to measure mass of rare RI

Publications

1. T. Yamaguchi et al.:
   "Mass measurements by an isochronous storage ring at the RIKEN RI beam factory"
   Proc. of Int. Conf. on Nuclear Physics at Storage Rings (STORI'05), pp 297.
2. M. Yamaguchi et al.:
   "Design of an isochronous storage ring and an injection line for mass measurements at the RIKEN RI beam factory"
   Proc. of Int. Conf. on Nuclear Physics at Storage Rings (STORI'05), pp 315.
3. T. Kikuchi et al.:
   "Individual Correlation using Induction Modulator for mass Measurements by Isochronous Ring in RIKEN RI Beam Factory"
   Proc. Inter. Workshop on Recent Progress in Induction Accel. (RPIA2006), pp.127-131.
4. Y. Yamaguchi et al.:
   "Rare-RI ring project at RIKEN RI beam factory"
   Nuclear Instruments and Methods in Physics Research B 266, 4575-4578 (2008).
5. S. Nakajima et al.:
   "Development of a time-of-flight detector for the Rare-RI Ring project at RIKEN"
   Nuclear Instruments and Methods in Physics Research B 266, 4621-4624 (2008).