The nonradiative changeover costs follow the system WNR = W (0) exp(-alphap), in which p is the volume of phonons matching the Vitality hole. The nonradiative changeover charges of Er3+ show temperature dependence consistent with the multiphonon rest principle. In Tm3+ the temperature dependence of nonradiative peace prices is intricate https://er-yb-yab-crystal51604.onzeblog.com/33127384/a-secret-weapon-for-er-yb-yab-crystal