The nonradiative transition charges follow the method WNR = W (0) exp(-alphap), where p is the quantity of phonons matching the energy gap. The nonradiative changeover rates of Er3+ exhibit temperature dependence in keeping with the multiphonon relaxation concept. In Tm3+ the temperature dependence of nonradiative leisure fees is challenging https://gtr-ktpcrystal83715.verybigblog.com/33973485/little-known-facts-about-er-yb-yab-crystal