The nonradiative changeover costs Keep to the system WNR = W (0) exp(-alphap), where by p is the number of phonons matching the Strength hole. The nonradiative transition premiums of Er3+ exhibit temperature dependence in keeping with the multiphonon relaxation concept. In Tm3+ the temperature dependence of nonradiative rest premiums https://titusnnmjg.theisblog.com/33329276/not-known-factual-statements-about-er-yb-yab-crystal