µSR is an atomic, molecular and condensed matter experimental technique that exploits nuclear detection methods. Although particles are used as a probe, it is not a diffraction technique. Its two main features are the local nature of the muon probe, due to the short effective range of its interactions with matter, and the characteristic time-window (10−13 – 10−5 s) of the dynamical processes in atomic, molecular and condensed media that can be investigated by this technique. The closest parallel to µSR is "pulsed NMR", in which one observes time-dependent transverse nuclear polarization or the so-called "free induction decay" of the nuclear polarization. However, a key difference is that in µSR one uses a specifically implanted spin (the muon's) and does not rely on internal nuclear spins.