The nonradiative changeover charges Keep to the components WNR = W (0) exp(-alphap), the place p is the volume of phonons matching the Vitality gap. The nonradiative changeover premiums of Er3+ show temperature dependence according to the multiphonon relaxation principle. In Tm3+ the temperature dependence of nonradiative peace fees is https://janete824onm7.blogoxo.com/33283605/rumored-buzz-on-er-yb-yab-crystal