The nonradiative transition premiums Adhere to the formula WNR = W (0) exp(-alphap), wherever p is the volume of phonons matching the Strength gap. The nonradiative changeover charges of Er3+ exhibit temperature dependence consistent with the multiphonon peace theory. In Tm3+ the temperature dependence of nonradiative rest premiums is intricate https://gase-crystal30627.amoblog.com/er-yb-yab-crystal-can-be-fun-for-anyone-56623491