Measurement of the x-ray mass attenuation coefficient and determination of the imaginary component of the atomic form factor of molybdenum over the 13.541.5keV energy range

Martin D. de Jonge, Chanh Q. Tran, Christopher T. Chantler, Zwi Barnea, Bipin B. Dhal, David J. Cookson, Wah-Keat Lee, and Ali Mashayekhi
Phys. Rev. A 71, 032702 – Published 4 March 2005

Abstract

We use the x-ray extended-range technique (XERT) [Chantler et al., Phys. Rev. A 64, 062506 (2001)] to measure the mass attenuation coefficients of molybdenum in the x-ray energy range of 13.541.5keV to 0.02–0.15 % accuracy. Measurements made over an extended range of the measurement parameter space are critically examined to identify, quantify, and correct where necessary a number of experimental systematic errors. These results represent the most extensive experimental data set for molybdenum and include absolute mass attenuation coefficients in the regions of the x-ray absorption fine structure (XAFS) and x-ray-absorption near-edge structure (XANES). The imaginary component of the atomic form-factor f2 is derived from the photoelectric absorption after subtracting calculated Rayleigh and Compton scattering cross sections from the total attenuation. Comparison of the result with tabulations of calculated photoelectric absorption coefficients indicates that differences of 1–15 % persist between the calculated and observed values.

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  • Received 19 July 2004

DOI:https://doi.org/10.1103/PhysRevA.71.032702

©2005 American Physical Society

Authors & Affiliations

Martin D. de Jonge, Chanh Q. Tran, Christopher T. Chantler, Zwi Barnea, and Bipin B. Dhal

  • School of Physics, University of Melbourne, Melbourne, Victoria 3010, Australia

David J. Cookson*

  • Chem-Mat-CARS, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA

Wah-Keat Lee and Ali Mashayekhi

  • XOR 1-ID, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA

  • *Also at ANSTO, Private Mail Bag 1, Menai, New South Wales 2234, Australia.

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Vol. 71, Iss. 3 — March 2005

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