The nonradiative changeover premiums Keep to the formula WNR = W (0) exp(-alphap), in which p is the quantity of phonons matching the energy gap. The nonradiative transition costs of Er3+ show temperature dependence in line with the multiphonon leisure concept. In Tm3+ the temperature dependence of nonradiative peace premiums https://erybyabcrystal96284.blogdon.net/er-yb-yab-crystal-can-be-fun-for-anyone-49383452