RIKEN-RAL Muon Group
20 Aug 2009



The RIKEN-RAL Muon Facility uses beams of positive and negative muons for a variety of condensed matter and molecular studies, together with atomic and nuclear physics investigations.


​​​​Diagram of the RIKEN-RAL Muon Facility at ISIS 



Main Contact

  • Dr Tei M​atsuzaki

Other Contact

  • Dr Isao Watanabe

The RIKEN-RAL Muon facility has been constructed by RIKEN at Rutherford Appleton Laboratory in the UK, and is now part of the RIKEN Nishina Centre for Accelerator Based Science. The facility utilizes intense pulsed proton beam provided by the ISIS synchrotron accelerator. Thanks to an unique superconducting solenoid in our beam line, the facility produces the world's strongest source of backward decay pulsed mu+ or mu- in the momentum range from 20 MeV/c to 120 MeV/c as well as surface mu+ at 30MeV/c. A pulsed magnetic kicker split are used to split double-pulsed structure of the muon beam, enabling us to execute two experimental programs simultaneously at each channels. Important research activities such as investigations related to muon catalyzed fusion and studies of condensed matter by muon spin rotation/relaxation/resonance are now being actively pursued.


RIKEN-RAL Muon Group members have a wide variety of expertise, in areas such as:

  • condensed matter and molecular physics
  • muon technique development
  • muon beamline and spectrometer design
  • low-energy muon production
  • muon catalysed fusion
  • atomic and nuclear physics studies using muons