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Proceedings Paper

Improved ratio method for x-ray densitometry
Author(s): Geoffrey L. Harding; R. Armstrong; Sharon M. McDaid; Malcolm J. Cooper
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Paper Abstract

The ratio method, in which the elastic x-ray scatter signal Ie from a localized region of bulk material is normalized against the Compton scatter Ic, has been widely evaluated as a densitometric technique for evaluating mean atomic number. An analysis is presented of two major error sources influencing the ratio method. It is shown that a forward scattering geometry minimizes errors of both types for substances composed of low and medium Z elements. We describe a novel technique in which a K edge filter is used to separate small angle elastic and Compton scatter induced in a sample on irradiation with the FLUOREX fluorescent x-ray source. The feasibility of this method is demonstrated by first experimental results. The potential application of this technique to the problem of explosives detection is briefly discussed.

Paper Details

Date Published: 12 July 1994
PDF: 11 pages
Proc. SPIE 2278, X-Ray and UV Detectors, (12 July 1994); doi: 10.1117/12.180022
Show Author Affiliations
Geoffrey L. Harding, Philips Research Labs. (Germany)
R. Armstrong, Univ. of Warwick (United Kingdom)
Sharon M. McDaid, Univ. of Warwick (United Kingdom)
Malcolm J. Cooper, Univ. of Warwick (United Kingdom)

Published in SPIE Proceedings Vol. 2278:
X-Ray and UV Detectors
Richard B. Hoover; Mark W. Tate, Editor(s)

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