Theory of avoided level-crossing relaxation dynamics for axial muonated radicals

Surface Dynamics of the Cyclohexadienyl Radical Adsorbed on Silica Gel Investigated Using Avoided Level-Crossing Muon Spin Resonance

“…Since then, the theoretical model has been greatly improved. This work provides the first example where the analysis of experimental data is based on a stochastic Liouville formalism which was adapted by Kreitzman [19] [20]. The experimental time scale of dynamic processes which partly average out the dipolar interactions are thus typically a few tens of nanoseconds, which is the same order of magnitude as correlation times amenable to the study of diamagnetic molecules by means of NMR [3].…”

Importance of Spin-Orbit Interaction for the Electron Spin Relaxation in Organic Semiconductors

“…In an ALC experiment a magnetic field is applied parallel to the initial muons spin direction. At a particular value of the magnetic field, due to cross relaxation effects, a depolarization of the muon spin occurs, and gives rise to the observed ALC resonances, even in the absence of eSR [28,29]. Since the spins of the electron and of the muon in muonium are coupled, if an electron spin relaxation mechanism is effective in the material it causes a further relaxation of the muon spin.…”

Muon spin relaxation study of spin dynamics in poly(triarylamine)

“…In an Avoided Level Crossing (ALC) experiment a magnetic field is applied parallel to the initial muons spin direction. At a particular value of the magnetic field, due to cross relaxation effects, a depolarisation of the muon spin occurs, and gives rise to the observed ALC resonances, even in the absence of eSR [25,26]. Since the spins of the electron and of the muon in Muonium are coupled, if an electron spin relaxation mechanism is effective in the material it causes a further relaxation of the muon spin.…”