The nonradiative changeover charges Adhere to the method WNR = W (0) exp(-alphap), where p is the amount of phonons matching the energy gap. The nonradiative changeover costs of Er3+ show temperature dependence per the multiphonon relaxation concept. In Tm3+ the temperature dependence of nonradiative relaxation prices is challenging from https://er-yb-yab-crystal74184.uzblog.net/er-yb-yab-crystal-an-overview-47075716