The nonradiative transition fees Keep to the system WNR = W (0) exp(-alphap), where p is the number of phonons matching the Electrical power gap. The nonradiative transition prices of Er3+ show temperature dependence in line with the multiphonon relaxation concept. In Tm3+ the temperature dependence of nonradiative rest fees https://er-yb-yab-crystal09284.pages10.com/er-yb-yab-crystal-an-overview-68503095