The nonradiative transition costs Stick to the system WNR = W (0) exp(-alphap), in which p is the number of phonons matching the Strength hole. The nonradiative transition premiums of Er3+ show temperature dependence per the multiphonon peace theory. In Tm3+ the temperature dependence of nonradiative rest charges is difficult https://andreahjkl.ezblogz.com/64900729/5-easy-facts-about-er-yb-yab-crystal-described