The nonradiative changeover prices Adhere to the method WNR = W (0) exp(-alphap), where p is the quantity of phonons matching the Power hole. The nonradiative transition costs of Er3+ show temperature dependence according to the multiphonon rest principle. In Tm3+ the temperature dependence of nonradiative relaxation charges is challenging https://er-yb-yab-crystal52849.mybloglicious.com/53644097/er-yb-yab-crystal-an-overview