The nonradiative changeover charges Stick to the system WNR = W (0) exp(-alphap), wherever p is the volume of phonons matching the Vitality hole. The nonradiative transition fees of Er3+ show temperature dependence per the multiphonon leisure principle. In Tm3+ the temperature dependence of nonradiative relaxation prices is complicated from https://er-yb-yab-crystal63849.buyoutblog.com/34767869/not-known-factual-statements-about-er-yb-yab-crystal