Figure 8
Experimental values of effective mass-attenuation coefficient as a function of rotation angle for a 2 mm Al filter obtained with a 25 keV monochromatic X-ray beam. Different thicknesses of Cu filter have been included upstream of the Al. Values of from the NIST database, for the fundamental and first three harmonics, are included for comparison (grey lines). Experimental values are also shown for 75 and 100 keV monochromatic beams. Each of the 25 keV data sets has an accompanying solid line which is from calculation and assuming the presence of just the fundamental and λ/3 components. See text for further details. |