The nonradiative transition costs follow the components WNR = W (0) exp(-alphap), wherever p is the amount of phonons matching the energy gap. The nonradiative changeover charges of Er3+ show temperature dependence in step with the multiphonon peace concept. In Tm3+ the temperature dependence of nonradiative leisure rates is challenging https://erybyabcrystal42852.life3dblog.com/33691469/the-best-side-of-er-yb-yab-crystal