The nonradiative transition premiums follow the formula WNR = W (0) exp(-alphap), where p is the amount of phonons matching the Strength gap. The nonradiative transition rates of Er3+ show temperature dependence according to the multiphonon leisure concept. In Tm3+ the temperature dependence of nonradiative relaxation premiums is intricate with https://erybyabcrystal20730.theideasblog.com/35304553/5-simple-techniques-for-er-yb-yab-crystal