The nonradiative transition premiums Keep to the formula WNR = W (0) exp(-alphap), exactly where p is the volume of phonons matching the Vitality hole. The nonradiative transition costs of Er3+ show temperature dependence per the multiphonon peace theory. In Tm3+ the temperature dependence of nonradiative leisure fees is complicated https://er-yb-yab-crystal75296.blogchaat.com/33240435/the-basic-principles-of-er-yb-yab-crystal