The nonradiative changeover rates Adhere to the system WNR = W (0) exp(-alphap), where by p is the number of phonons matching the Strength gap. The nonradiative transition fees of Er3+ show temperature dependence per the multiphonon peace idea. In Tm3+ the temperature dependence of nonradiative rest premiums is complex https://er-yb-yab-crystal51738.creacionblog.com/33116267/5-simple-techniques-for-er-yb-yab-crystal