The nonradiative changeover premiums follow the system WNR = W (0) exp(-alphap), in which p is the volume of phonons matching the Vitality gap. The nonradiative transition premiums of Er3+ show temperature dependence per the multiphonon peace theory. In Tm3+ the temperature dependence of nonradiative rest premiums is difficult from https://erybyabcrystal08528.blog2freedom.com/33100140/the-2-minute-rule-for-er-yb-yab-crystal