10.14489/td.2014.010.pp.025-030

2014, 10 October

DOI: 10.14489/td.2014.010.pp.025-030

Gorshkov V. A.
FEATURES OF DUAL-EENERGY X-RAY DENSITOMETRY OF MULTI-COMPONENT OBJECTS
(pp. 25-30)

Abstract. The monochromatic dual-energy X-ray densitometry allows estimating the multi-component object density which variation is caused by the instability of the chemical composition. It is shown that if the dual photometrie is a systematic error due to a systematic bias in the estimation of the effective atomic number, commensurable with the natural variation of the density. Effective atomic number of multi-component of the calibration sample calculated analytically for the known mass concentrations and atomic numbers of the components in the calibration samples is not equivalent to the atomic number corresponding to the mass absorption coefficient. Equivalence is only for homogeneous objects. It is proposed to calculate the sample effective atomic number on the linear absorption coefficient measurement and the known density. The regression equation removing the systematic error in the density measurement is determined by this sample.

Keywords: X-ray, dual-energy densitometry, multicomponent objects, atomic number, systematic error.

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V. A. Gorshkov
JSC RII “Spectrum”, Moscow, Russia. E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

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