The nonradiative changeover rates follow the formulation WNR = W (0) exp(-alphap), where by p is the volume of phonons matching the Electricity gap. The nonradiative transition prices of Er3+ show temperature dependence according to the multiphonon rest concept. In Tm3+ the temperature dependence of nonradiative relaxation rates is complicated https://gracec302hja8.vidublog.com/profile