The Centre for Molecular and Materials Science (CMMS) provides unique tools for Canadian and international scientists to better understand matter at the microscopic level. We provide intense spin-polarized beams of muons (µ+ or µ) and lithium-8 (8Li), which are implanted into a material and characterized with novel magnetic resonance techniques known as µSR (muon spin rotation / relaxation / resonance) and βNMR (beta-detected nuclear magnetic resonance). µSR and βNMR can provide unique information about a wide range of materials (magnetic systems, superconductors, semiconductors, batteries and free radicals) that is unavailable with conventional spectroscopic methods.

Recent Highlights

Local Electronic Structure and Dynamics of Muon-Polaron Complexes in Fe2O3
M. H. Dehn, et al.
Phys. Rev. Lett. 126, 037202 (2021). doi 10.1103/PhysRevLett.126.037202

Coexistence of metallic and nonmetallic properties in the pyrochlore Lu2Rh2O7
A. M. Hallas et al.
npj Quantum Materials 4, 9 (2019). doi 10.1038/s41535-019-0148-1

Incommensurate Magnetism Near Quantum Criticality in CeNiAsO
Shan Wu et al.
Phys. Rev. Lett. 122 197203 (2019), doi 10.1103/PhysRevLett.122.197203

Magnetic moment of rare-earth elements in R2Fe14B estimated with µ+SR
Jun Sugiyama et al.
Phys. Rev. Materials 3, 064402 (2019)

The proposal submission deadline for the MMS-EEC is June 28th, 2023. The next meeting will take place on Aug 1st and 2nd, 2023.


  • As of 2019, TRIUMF CMMS will no longer charging academic researchers for liquid helium or other user fees.

  • The procedures for visiting scientists have been changed. Please contact I. McKenzie to request an invitation. Once you have received the invitation you must fill in your details on the Visitor App. Group leaders will be able to invite subordinates. Your training status can be found here. You must review the safety orientation before site access is permitted. You must have valid Personnel Safety Alarms and Basic Radiation Protection training before coming to TRIUMF. A further hands-on test is required to access exclusion areas.

  • TRIUMF, µSR and βNMR

    Applying for Beamtime

    Facility Resources

    Running Experiments

    Discovery, accelerated

    Centre for Molecular and Materials Science
    4004 Wesbrook Mall
    Vancouver, B.C. Canada V6T 2A3