The nonradiative changeover rates follow the system WNR = W (0) exp(-alphap), in which p is the number of phonons matching the Vitality hole. The nonradiative transition fees of Er3+ exhibit temperature dependence in step with the multiphonon peace concept. In Tm3+ the temperature dependence of nonradiative rest fees is https://johnnynonkg.digitollblog.com/33093824/not-known-factual-statements-about-er-yb-yab-crystal