title: New consistency tests for high-accuracy measurements of X-ray mass attenuation coefficients by the X-ray extended-range technique.
abstract: 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.
authors.affiliation: School of Physics, University of Melbourne, Melbourne, Australia. chantler@unimelb.edu.au
authors.forename: C T
authors.initials: CT
authors.lastname: Chantler
authors.forename: M T
authors.initials: MT
authors.lastname: Islam
authors.forename: N A
authors.initials: NA
authors.lastname: Rae
authors.forename: C Q
authors.initials: CQ
authors.lastname: Tran
authors.forename: J L
authors.initials: JL
authors.lastname: Glover
authors.forename: Z
authors.initials: Z
authors.lastname: Barnea