The nonradiative changeover costs follow the formulation WNR = W (0) exp(-alphap), exactly where p is the number of phonons matching the Electricity gap. The nonradiative changeover costs of Er3+ show temperature dependence consistent with the multiphonon leisure theory. In Tm3+ the temperature dependence of nonradiative rest fees is complex https://crystal84062.blogadvize.com/40460434/er-yb-yab-crystal-an-overview