The nonradiative changeover costs Stick to the system WNR = W (0) exp(-alphap), the place p is the volume of phonons matching the energy gap. The nonradiative changeover fees of Er3+ show temperature dependence consistent with the multiphonon relaxation theory. In Tm3+ the temperature dependence of nonradiative relaxation prices is https://israelrydij.boyblogguide.com/32307478/the-basic-principles-of-er-yb-yab-crystal