Energy transfer between rare-earth ions in the SO 2 Cl 2 -GaGl 3 system

Novel mechanism for energy transfer between rare earth ions

Energy transfer from tunable donor states to rare earth ions

Exchange mechanism of nonradiative energy transfer between rare-earth ions in crystals

Nonresonance Excitation Energy Transfer Between Impurity Rare-earth Ions

Investigation of the Mechanism of the Elementary Act of Excitation-energy Transfer Between Rare-earth Ions in Crystals

Excitation Energy Transfer between Trivalent Rare-earth Ions, Stimulated by a Radiation Field