The nonradiative changeover charges Keep to the components WNR = W (0) exp(-alphap), where p is the number of phonons matching the Power gap. The nonradiative transition rates of Er3+ show temperature dependence according to the multiphonon rest theory. In Tm3+ the temperature dependence of nonradiative peace premiums is intricate https://erybyabcrystal57801.onzeblog.com/34852728/not-known-factual-statements-about-er-yb-yab-crystal