Figure 10
Experimental spectra (broken line, in gray) and pile-up model (smooth line, in black) according to equation (8), (a) without an X-ray attenuator at 56 kHz and (b) with an the X-ray attenuator at 42 kHz. The scale is chosen to highlight the pile-up events; the experimental spectrum was clipped below 19 keV. The energy dispersion is 13 eV channel−1. Notice that the beam energy is 18.5 keV. |