Reconstruction of incident X-ray spectra using the Medipix2 detector

The single photon counting pixel detector Medipix2 has been used in a variety of applications. Because of its spectral capability, the detector could be used as spectrometer. However the measured spectrum is not the real incident spectrum as the Medipix suffers from charge sharing because of its small pixel size. This implies that the energy information is smeared out heavily. Knowing the measured spectrum and the responses to monoenergetic exposure we applied some deconvolution methods to determine the incoming spectrum.