The nonradiative transition costs Keep to the formulation WNR = W (0) exp(-alphap), where p is the amount of phonons matching the Electrical power hole. The nonradiative transition prices of Er3+ show temperature dependence in keeping with the multiphonon peace principle. In Tm3+ the temperature dependence of nonradiative peace rates https://chanceiihfb.is-blog.com/39616468/not-known-details-about-er-yb-yab-crystal