New consistency tests for high-accuracy measurements of X-ray mass attenuation coefficients by the X-ray extended-range technique

Journal Article · Tue Sep 25 00:00:00 EDT 2012 · Acta Crystallogr. A

DOI:https://doi.org/10.1107/S0108767311044990· OSTI ID:1038279

Chantler, C T; Islam, M T; Rae, N A; Tran, C Q; Glover, J L; Barnea, Z ^[1]

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1. La Trobe

An extension of the X-ray extended-range technique is described for measuring X-ray mass attenuation coefficients by introducing absolute measurement of a number of foils - the multiple independent foil technique. Illustrating the technique with the results of measurements for gold in the 38-50 keV energy range, it is shown that its use enables selection of the most uniform and well defined of available foils, leading to more accurate measurements; it allows one to test the consistency of independently measured absolute values of the mass attenuation coefficient with those obtained by the thickness transfer method; and it tests the linearity of the response of the counter and counting chain throughout the range of X-ray intensities encountered in a given experiment. In light of the results for gold, the strategy to be ideally employed in measuring absolute X-ray mass attenuation coefficients, X-ray absorption fine structure and related quantities is discussed.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
• Sponsoring Organization: FOREIGN
• OSTI ID: 1038279
• Journal Information: Acta Crystallogr. A, Vol. 68, Issue (2) ; 03, 2012; ISSN 0108-7673
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

58 GEOSCIENCES
ABSORPTION
ATTENUATION
CHAINS
ENERGY RANGE
FINE STRUCTURE
GOLD
THICKNESS