The nonradiative changeover charges Adhere to the method WNR = W (0) exp(-alphap), in which p is the volume of phonons matching the energy hole. The nonradiative transition charges of Er3+ show temperature dependence per the multiphonon peace theory. In Tm3+ the temperature dependence of nonradiative peace fees is complex https://andyghgea.bloggip.com/33339566/5-simple-statements-about-er-yb-yab-crystal-explained