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Figure 9
Photon spectra for 22.16 keV X-rays illuminating a single pixel through a pinhole mask. The first peak corresponds to 0 absorbed photons, the second to 1 absorbed photon etc. A sum of Gaussians constrained to have the same separation between maxima is fitted to determine a pixel gain of 8.5 ± 0.02 ADU keV−1 in high-gain mode for this sensor bonded to the CU-APS-PAD ASIC. |