The nonradiative transition prices Stick to the components WNR = W (0) exp(-alphap), in which p is the amount of phonons matching the Electricity hole. The nonradiative transition rates of Er3+ show temperature dependence per the multiphonon peace theory. In Tm3+ the temperature dependence of nonradiative relaxation rates is complicated https://erybyabcrystal30628.total-blog.com/considerations-to-know-about-er-yb-yab-crystal-58513106