The nonradiative changeover prices follow the system WNR = W (0) exp(-alphap), wherever p is the volume of phonons matching the Strength hole. The nonradiative transition charges of Er3+ show temperature dependence in step with the multiphonon relaxation concept. In Tm3+ the temperature dependence of nonradiative rest fees is intricate https://er-yb-yab-crystal59614.verybigblog.com/32359106/not-known-factual-statements-about-er-yb-yab-crystal