The nonradiative transition costs Stick to the formula WNR = W (0) exp(-alphap), where p is the volume of phonons matching the energy gap. The nonradiative transition fees of Er3+ show temperature dependence in step with the multiphonon peace theory. In Tm3+ the temperature dependence of nonradiative relaxation charges is https://erybyabcrystal85173.tblogz.com/er-yb-yab-crystal-an-overview-46893035