The nonradiative changeover premiums Stick to the system WNR = W (0) exp(-alphap), in which p is the volume of phonons matching the Power gap. The nonradiative changeover rates of Er3+ exhibit temperature dependence in keeping with the multiphonon peace theory. In Tm3+ the temperature dependence of nonradiative relaxation premiums https://er-yb-yab-crystal41738.aboutyoublog.com/36394776/the-basic-principles-of-er-yb-yab-crystal