The nonradiative changeover premiums follow the formula WNR = W (0) exp(-alphap), the place p is the quantity of phonons matching the Power gap. The nonradiative transition premiums of Er3+ exhibit temperature dependence per the multiphonon peace concept. In Tm3+ the temperature dependence of nonradiative rest premiums is difficult via https://erybyabcrystal74062.wizzardsblog.com/33098042/details-fiction-and-er-yb-yab-crystal