The nonradiative changeover premiums follow the system WNR = W (0) exp(-alphap), the place p is the number of phonons matching the energy hole. The nonradiative transition rates of Er3+ exhibit temperature dependence consistent with the multiphonon leisure concept. In Tm3+ the temperature dependence of nonradiative peace fees is challenging https://er-yb-yab-crystal51483.therainblog.com/33671288/the-smart-trick-of-er-yb-yab-crystal-that-no-one-is-discussing