The nonradiative changeover rates Keep to the formulation WNR = W (0) exp(-alphap), in which p is the volume of phonons matching the Power gap. The nonradiative changeover prices of Er3+ show temperature dependence consistent with the multiphonon rest principle. In Tm3+ the temperature dependence of nonradiative relaxation charges is https://erybyabcrystal08517.total-blog.com/not-known-details-about-er-yb-yab-crystal-60049545