Abstract
We investigated the energy resolution of a segmented silicon strip detector for photon-counting spectral computed tomography (CT). The detector response to different monochromatic photon energies and various photon fluxes was characterized at the Elettra synchrotron. An RMS energy resolution of 1.50keV has been demonstrated for 22keV photons at zero flux, and it deteriorated as a function of input count rate at a rate of 5.1eVmm2/Mcps. The charge sharing effect has been evaluated. The results show that around 11.1% of the interacting photons experience charge sharing for 22keV photons and 15.3% for 30keV.
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