The nonradiative changeover fees Keep to the formulation WNR = W (0) exp(-alphap), where by p is the quantity of phonons matching the Power hole. The nonradiative changeover charges of Er3+ show temperature dependence per the multiphonon leisure principle. In Tm3+ the temperature dependence of nonradiative peace rates is complex https://erybyabcrystal30740.tkzblog.com/34569746/er-yb-yab-crystal-an-overview