The nonradiative changeover premiums follow the formulation WNR = W (0) exp(-alphap), where by p is the amount of phonons matching the Electrical power gap. The nonradiative transition fees of Er3+ exhibit temperature dependence per the multiphonon peace theory. In Tm3+ the temperature dependence of nonradiative rest premiums is complicated https://erybyabcrystal73718.blogoscience.com/39358261/the-definitive-guide-to-er-yb-yab-crystal