The nonradiative transition charges Keep to the system WNR = W (0) exp(-alphap), where p is the number of phonons matching the Strength gap. The nonradiative changeover prices of Er3+ show temperature dependence according to the multiphonon relaxation concept. In Tm3+ the temperature dependence of nonradiative rest prices is challenging https://er-yb-yab-crystal38371.vidublog.com/32361792/the-best-side-of-er-yb-yab-crystal