The nonradiative transition costs follow the system WNR = W (0) exp(-alphap), in which p is the volume of phonons matching the Strength gap. The nonradiative changeover charges of Er3+ show temperature dependence according to the multiphonon relaxation concept. In Tm3+ the temperature dependence of nonradiative leisure prices is intricate https://er-yb-yab-crystal63950.fireblogz.com/64519650/the-definitive-guide-to-er-yb-yab-crystal