The nonradiative transition premiums follow the system WNR = W (0) exp(-alphap), in which p is the quantity of phonons matching the Vitality hole. The nonradiative transition premiums of Er3+ show temperature dependence in keeping with the multiphonon peace concept. In Tm3+ the temperature dependence of nonradiative relaxation charges is https://er-yb-yab-crystal40494.glifeblog.com/32194613/little-known-facts-about-er-yb-yab-crystal