Research centres worldwide use muons as probes to investigate properties of a diverse range of materials (source: Jeff E. Sonier).
TRIUMF Centre for Molecular and Materials Science at TRIUMF, Vancouver, Canada
J-PARC in Tsukuba, Japan.
Paul Scherrer Institut (PSI), Villigen, Switzerland
Rutherford Appleton Laboratory (RAL), Didcot, Oxfordshire, UK