Title :
Spectral response of pixellated semiconductor X-ray detectors
Author :
Fröjdh, Christer ; Nilsson, Hans-Erik ; Norlin, Börje
Author_Institution :
Mid Sweden Univ., Sundsvall
Abstract :
X-ray imaging with energy resolution can be performed using a detector matrix bonded to a photon counting CMOS readout circuit as the MEDIPIX2 chip. In previous experiments it has been shown that charge sharing between neighboring pixels plays an important role in the formation of the image and especially for the spectral information in the image. Charge sharing is caused both by the localization of the initial energy deposition and by diffusion during the transport of the charge to the readout electrode. In this work we have studied different factors that can effect the energy resolution in pixellated X-ray imaging detectors. Results are compared to experimental data
Keywords :
CMOS integrated circuits; X-ray apparatus; X-ray imaging; nuclear electronics; position sensitive particle detectors; readout electronics; semiconductor counters; MEDIPIX2 chip; X-ray imaging; charge diffusion; charge sharing; detector matrix; photon counting CMOS readout circuit; pixellated semiconductor X-ray detectors; spectral response; Electrodes; Electromagnetic scattering; Electrons; Event detection; Fluorescence; Particle scattering; X-ray detection; X-ray detectors; X-ray imaging; X-ray scattering;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2005 IEEE
Conference_Location :
Fajardo
Print_ISBN :
0-7803-9221-3
DOI :
10.1109/NSSMIC.2005.1596954