The nonradiative changeover premiums follow the method WNR = W (0) exp(-alphap), in which p is the volume of phonons matching the Strength hole. The nonradiative changeover premiums of Er3+ exhibit temperature dependence in step with the multiphonon leisure theory. In Tm3+ the temperature dependence of nonradiative rest rates is https://erybyabcrystal19628.fireblogz.com/64376433/a-review-of-er-yb-yab-crystal