The nonradiative transition rates Keep to the system WNR = W (0) exp(-alphap), wherever p is the volume of phonons matching the Strength gap. The nonradiative changeover prices of Er3+ exhibit temperature dependence consistent with the multiphonon rest theory. In Tm3+ the temperature dependence of nonradiative peace charges is sophisticated https://pietx368tsp8.webbuzzfeed.com/profile