The nonradiative changeover costs Stick to the system WNR = W (0) exp(-alphap), in which p is the volume of phonons matching the Strength gap. The nonradiative changeover fees of Er3+ exhibit temperature dependence consistent with the multiphonon rest principle. In Tm3+ the temperature dependence of nonradiative relaxation charges is https://erybyabcrystal83604.designi1.com/54360717/5-simple-statements-about-er-yb-yab-crystal-explained