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Research methods - Muon spin rotation (μSR)
The positive muon, μ+, is a short-lived particle which is used for measuring local magnetic fields inside materials by the observation of Muon Spin Rotation (or Relaxation).
It is sensitive to extremeely weak magnetism and applicable to many areas of magnetism and magnetic relaxation (but at the present stage only applicable to bulk systems). The positive muon can also be regarded as a light isotope of hydrogen and the results for diffusion of muons have been of value for the understanding of basic aspects of hydrogen interactions and hydrogen mobility in metals and metal hydrides. Muons are produced in accelerators and the group has access to facilities in ISIS, UK, PSI, Switzerland and TRIUMF, Canada.