The nonradiative transition rates Keep to the components WNR = W (0) exp(-alphap), where by p is the amount of phonons matching the Strength hole. The nonradiative changeover premiums of Er3+ show temperature dependence consistent with the multiphonon relaxation theory. In Tm3+ the temperature dependence of nonradiative relaxation prices is https://lukassutqn.csublogs.com/39922959/not-known-details-about-er-yb-yab-crystal