The nonradiative transition charges follow the method WNR = W (0) exp(-alphap), where p is the quantity of phonons matching the energy gap. The nonradiative transition costs of Er3+ show temperature dependence in step with the multiphonon leisure idea. In Tm3+ the temperature dependence of nonradiative relaxation charges is challenging https://er-yb-yab-crystal64073.techionblog.com/33295215/examine-this-report-on-er-yb-yab-crystal