The nonradiative changeover premiums Adhere to the formulation WNR = W (0) exp(-alphap), where p is the volume of phonons matching the energy hole. The nonradiative transition prices of Er3+ show temperature dependence consistent with the multiphonon peace principle. In Tm3+ the temperature dependence of nonradiative peace prices is sophisticated https://er-yb-yab-crystal26048.myparisblog.com/33827549/not-known-factual-statements-about-er-yb-yab-crystal