The nonradiative transition prices Keep to the components WNR = W (0) exp(-alphap), in which p is the quantity of phonons matching the energy hole. The nonradiative changeover premiums of Er3+ show temperature dependence per the multiphonon leisure principle. In Tm3+ the temperature dependence of nonradiative rest premiums is complicated https://erybyabcrystal96134.blog-ezine.com/34958658/details-fiction-and-er-yb-yab-crystal