The nonradiative transition costs follow the system WNR = W (0) exp(-alphap), in which p is the volume of phonons matching the Power hole. The nonradiative changeover charges of Er3+ show temperature dependence in line with the multiphonon leisure idea. In Tm3+ the temperature dependence of nonradiative leisure fees is https://er-yb-yab-crystal20639.activablog.com/33931545/the-basic-principles-of-er-yb-yab-crystal