Schmidtke, G.G.Schmidtke2022-03-032022-03-032000https://publica.fraunhofer.de/handle/publica/19880110.1016/S1464-1917(00)00081-7Our knowledge on the effective photoabsorption cross sections of the solar Extreme Ultraviolet/Ultraviolet (EUV/UV) emissions should be improved to increase the accuracy of the first principle thermospheric/ionospheric models. In this context the effect of 'radiation hardening' and possible implications are discussed. An experiment is proposed to derive a complete set of photoabsorption cross sections for the relevant EUV/UV spectral region.en621550journal article