The nonradiative transition charges follow the system WNR = W (0) exp(-alphap), in which p is the number of phonons matching the Strength hole. The nonradiative transition costs of Er3+ show temperature dependence in step with the multiphonon peace theory. In Tm3+ the temperature dependence of nonradiative rest premiums is https://erybyabcrystal97418.isblog.net/the-basic-principles-of-er-yb-yab-crystal-51954163