The nonradiative transition costs follow the method WNR = W (0) exp(-alphap), exactly where p is the volume of phonons matching the Strength 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://erybyabcrystal46890.theideasblog.com/35313307/top-guidelines-of-er-yb-yab-crystal