The nonradiative changeover charges follow the system WNR = W (0) exp(-alphap), exactly where p is the volume of phonons matching the Vitality gap. The nonradiative changeover prices of Er3+ exhibit temperature dependence consistent with the multiphonon peace idea. In Tm3+ the temperature dependence of nonradiative relaxation charges is complex https://er-yb-yab-crystal41851.yomoblog.com/41449034/er-yb-yab-crystal-an-overview