The nonradiative transition fees Keep to the components WNR = W (0) exp(-alphap), wherever p is the number of phonons matching the Strength hole. The nonradiative transition fees of Er3+ show temperature dependence consistent with the multiphonon rest principle. In Tm3+ the temperature dependence of nonradiative peace rates is difficult https://josuernhat.theblogfairy.com/32369084/little-known-facts-about-er-yb-yab-crystal