The nonradiative changeover rates Adhere to the method WNR = W (0) exp(-alphap), wherever p is the volume of phonons matching the Electrical power gap. The nonradiative changeover premiums of Er3+ exhibit temperature dependence in step with the multiphonon relaxation theory. In Tm3+ the temperature dependence of nonradiative rest premiums https://daltonaazws.anchor-blog.com/13418725/a-review-of-er-yb-yab-crystal