The nonradiative transition fees Keep to the method WNR = W (0) exp(-alphap), where p is the quantity of phonons matching the energy gap. The nonradiative changeover charges of Er3+ exhibit temperature dependence according to the multiphonon rest principle. In Tm3+ the temperature dependence of nonradiative peace charges is sophisticated https://charliennlid.blogaritma.com/31517201/er-yb-yab-crystal-an-overview