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Spectral Response in a Pixellated X-ray Imaging CdTe Detector with Single Photon Processing Readout
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media. (Radiation detection)
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media. (STC)
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media. (STC)
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media. (STC)ORCID iD: 0000-0002-8325-5177
2010 (English)In: Proceeddings of 2010 Nuclear Science Symposium and Medical Imaging Conference, IEEE conference proceedings, 2010, 1079-1080 p.Conference paper, Published paper (Other academic)
Abstract [en]

The image forming process in a CdTe detector is both a function of the X-ray interaction in the material, including scattering and fluorescence, and the charge transport in the material [2]-[4]. The response of individual photons has been investigated using two pixellated CdTe image detectors with pixel pitches of 55 mu m and 110 mu m. The detectors were bonded to TIMEPIX [5] readout chips and operated in time over threshold mode (ToT). We have illuminated the sensors with monoengertic photons generated by X-ray fluorescence in metal sheets and with gamma photons from Am-241 and Cs-137. Results shows a large degradation in energy resolution caused by charge sharing and fluorescence. By summing pixels together we can correct for the charge sharing and some, but not all fluorescence.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2010. 1079-1080 p.
Series
IEEE Nuclear Science Symposium Conference Record, ISSN 1082-3654
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-12574ISI: 000306402901050Scopus ID: 2-s2.0-79960311149ISBN: 978-1-4244-9106-3 (print)OAI: oai:DiVA.org:miun-12574DiVA: diva2:376817
Conference
2010 Nuclear Science Symposium and Medical Imaging Conference
Available from: 2010-12-13 Created: 2010-12-13 Last updated: 2016-09-26Bibliographically approved

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Fröjdh, ErikNorlin, BörjeThungström, GöranFröjdh, Christer
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CiteExportLink to record
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