DocumentCode :
1818379
Title :
Effect of anomalous scattering and K-fluroscence reabsorption on the performance of selenium
Author :
Sultana, A. ; Reznik, A. ; Karim, K.S. ; Rowlands, J.A.
Author_Institution :
Electr. & Comput. Eng., Univ. of Waterloo, Waterloo, ON
Volume :
1
fYear :
2008
fDate :
13-15 Oct. 2008
Firstpage :
193
Lastpage :
196
Abstract :
Selenium (Se) has been successfully employed as a photoconductor to convert incident X-rays to electronic charges in direct conversion flat panel detectors for digital imaging systems. We have studied the effect of K-fluorescence reabsorption coupled with anomalous scattering on the performance of Se in protein crystallography detectors. Anomalous scattering is used as a method of phase calculation in crystallography. For occurrence of anomalous scattering, incident X-ray energy is made equal to the K-edge energy of Se. Our study indicates that significant K--fluorescence escape and reabsorption occurs at K-edge energy which degrades spatial resolution, sensitivity, and signal-to-noise ratio of the detector.
Keywords :
crystallography; fluorescence; photoconducting materials; proteins; selenium; K-edge energy; K-fluroscence reabsorption; Se; anomalous scattering; digital imaging systems; direct conversion flat panel detectors; electronic charges; incident X-ray energy; photoconductor; protein crystallography detectors; selenium; Crystallography; Degradation; Digital images; Photoconductivity; Proteins; Signal to noise ratio; Spatial resolution; X-ray detection; X-ray detectors; X-ray scattering; K- fluorescence reabsorption; anomalous scattering; photoconductor; selenium;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Semiconductor Conference, 2008. CAS 2008. International
Conference_Location :
Sinaia
ISSN :
1545-827X
Print_ISBN :
978-1-4244-2004-9
Type :
conf
DOI :
10.1109/SMICND.2008.4703366
Filename :
4703366
Link To Document :
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