The nonradiative changeover rates Keep to the system WNR = W (0) exp(-alphap), wherever p is the volume of phonons matching the Power hole. The nonradiative changeover costs of Er3+ exhibit temperature dependence per the multiphonon relaxation theory. In Tm3+ the temperature dependence of nonradiative relaxation charges is challenging by https://er-yb-yab-crystal84949.acidblog.net/64266349/what-does-er-yb-yab-crystal-mean