The nonradiative transition premiums Keep to the system WNR = W (0) exp(-alphap), in which p is the volume of phonons matching the Vitality hole. The nonradiative transition charges of Er3+ exhibit temperature dependence per the multiphonon relaxation principle. In Tm3+ the temperature dependence of nonradiative rest fees is intricate https://erybyabcrystal31976.blogacep.com/38409953/details-fiction-and-er-yb-yab-crystal