The nonradiative transition costs follow the components WNR = W (0) exp(-alphap), the place p is the number of phonons matching the Strength gap. The nonradiative changeover prices of Er3+ show temperature dependence consistent with the multiphonon rest idea. In Tm3+ the temperature dependence of nonradiative relaxation premiums is difficult https://er-yb-yab-crystal39516.blogthisbiz.com/40011164/a-secret-weapon-for-er-yb-yab-crystal