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Figure 3
Determination of the absorption constants μ for HOPG for linearly polarized light incident with p-geometry. Using the procedure described in the text, manipulated TEY spectrum η (left axis of ordinates) is interpreted as the energy function of the absorption constant μ (right axis of ordinates). Open circles show the measured η. Filled symbols correspond to different constant values of the creation efficiency M = 1/. The inset shows in more detail the π-resonance peak, where differences are most pronounced. It is apparent that if the mean creation energy is increased, the problematic saturation of the measured yield at the resonance peak is appropriately compensated. An increase of corresponds to a reduction of the ratio of secondary to primary electrons.

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