Figure 11
Sensitivity of the CCD detector as a function of photon energy, plotted as the number of CCD counts per detected X-ray photon. Data labeled `absolute sensitivity' (closed symbols) indicate a direct comparison of intensities measured with both scintillator and CCD detectors obtained under the same scattering condition and on the same sample. Data labeled `relative sensitivity' (open symbols) indicate the fraction changes in sensitivity of the CCD with respect to a measurement at 19.5 keV, after correcting for the nominal energy-dependent sensitivity of the ion chamber used as a monitor. The solid line corresponds to the calibration curve with the number of CCD counts per X-ray photon expressed as 4.38 × E (keV). |