The nonradiative changeover premiums follow the components WNR = W (0) exp(-alphap), where p is the quantity of phonons matching the Strength hole. The nonradiative transition premiums of Er3+ exhibit temperature dependence in keeping with the multiphonon relaxation concept. In Tm3+ the temperature dependence of nonradiative leisure rates is challenging https://er-yb-yab-crystal63940.free-blogz.com/80386676/the-best-side-of-er-yb-yab-crystal