The nonradiative changeover premiums Keep to the system WNR = W (0) exp(-alphap), in which p is the volume of phonons matching the Vitality hole. The nonradiative transition costs of Er3+ show temperature dependence in line with the multiphonon rest theory. In Tm3+ the temperature dependence of nonradiative rest fees https://beckettdeeby.rimmablog.com/32332752/details-fiction-and-er-yb-yab-crystal