The nonradiative changeover costs Keep to the method WNR = W (0) exp(-alphap), the place p is the quantity of phonons matching the Power gap. The nonradiative changeover premiums of Er3+ show temperature dependence per the multiphonon peace concept. In Tm3+ the temperature dependence of nonradiative peace rates is intricate https://erybyabcrystal82603.blogsidea.com/39534020/not-known-factual-statements-about-er-yb-yab-crystal