The nonradiative changeover costs follow the system WNR = W (0) exp(-alphap), exactly where p is the number of phonons matching the Strength hole. The nonradiative changeover premiums of Er3+ show temperature dependence in step with the multiphonon peace idea. In Tm3+ the temperature dependence of nonradiative relaxation rates is https://er-yb-yab-crystal30628.fitnell.com/74057329/little-known-facts-about-er-yb-yab-crystal