The nonradiative transition charges Adhere to the method WNR = W (0) exp(-alphap), wherever p is the number of phonons matching the Power hole. The nonradiative transition rates of Er3+ show temperature dependence according to the multiphonon relaxation idea. In Tm3+ the temperature dependence of nonradiative rest costs is complex https://sethjjiea.canariblogs.com/er-yb-yab-crystal-an-overview-48101452