The nonradiative changeover premiums Keep to the components WNR = W (0) exp(-alphap), wherever p is the volume of phonons matching the Electrical power hole. The nonradiative changeover costs of Er3+ show temperature dependence per the multiphonon relaxation theory. In Tm3+ the temperature dependence of nonradiative rest costs is intricate https://jonathanu257sqp8.wikikali.com/user