Photon interaction cross-sections and anomalous scattering factors of Cu and Ag

Sandiago,; Umesh, T. K.; Gowda, Ramakrishna

doi:10.1007/bf02847465

Cited by 12 publications

(13 citation statements)

References 22 publications

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“…Puttaswamy et al [33] (diamonds), Sandiago and Gowds [3] (triangles) and Visweswara et al [34] (squares). The tabulation from Henke, which is a synthesis between the theoretical input from [29,35] and experimental data, clearly shows significant discrepancies with other theoretical and experimental data.…”

Section: Comparison Between Theory and Experimentsmentioning

confidence: 98%

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Measurement of the x-ray mass attenuation coefficient of silver using the x-ray-extended range technique

Tran

Chantler

Barnea

et al. 2004

J. Phys. B: At. Mol. Opt. Phys.

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We used the x-ray-extended range technique to measure the x-ray mass attenuation coefficients of silver in the 15-50 keV energy range with a level of uncertainty between 0.27% and 0.4% away from the K-edge. The imaginary part of the atomic form factor of silver was derived by subtracting the scattering component from the measured total mass attenuation coefficients. Discrepancies between the measured mass attenuation coefficients and alternative theoretical predictions are discussed.

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Section: Comparison Between Theory and Experimentsmentioning

confidence: 98%

“…Semiempirical tabulation of Henke et al [31] (dotted-dashed line) are available up to 30 keV. Other experimental data include those from Machali et al [32] (asterisks), Puttaswamy et al [33] (diamonds), Sandiago and Gowds [3] (triangles) and Visweswara et al [34] (squares). [32] (asterisks), Figure 11.…”

Section: Summary Of Uncertaintiesmentioning

confidence: 99%

Measurement of the x-ray mass attenuation coefficient of silver using the x-ray-extended range technique

Tran

Chantler

Barnea

et al. 2004

J. Phys. B: At. Mol. Opt. Phys.

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“…Comparison of this work with two theories and other experimental measurements. This work is represented by diamonds, Sandiago & Gowa (1997) by circles, Tajuddin et al (1995 by triangles and Tran et al (2005) by squares. Two theoretical values FFAST and XCOM are represented by solid and dotted lines.…”

Section: Figure 12mentioning

confidence: 99%

Measurement of the X-ray mass attenuation coefficients of silver in the 5–20 keV range

Islam

Tantau

Rae

et al. 2014

J Synchrotron Radiat

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The X-ray mass attenuation coefficients of silver were measured in the energy range 5-20 keV with an accuracy of 0.01-0.2% on a relative scale down to 5.3 keV, and of 0.09-1.22% on an absolute scale to 5.0 keV. This analysis confirms that with careful choice of foil thickness and careful correction for systematics, especially including harmonic contents at lower energies, the X-ray attenuation of high-Z elements can be measured with high accuracy even at low X-ray energies (<6 keV). This is the first high-accuracy measurement of X-ray mass attenuation coefficients of silver in the low energy range, indicating the possibility of obtaining high-accuracy X-ray absorption fine structure down to the L1 edge (3.8 keV) of silver. Comparison of results reported here with an earlier data set optimized for higher energies confirms accuracy to within one standard error of each data set collected and analysed using the principles of the X-ray extended-range technique (XERT). Comparison with theory shows a slow divergence towards lower energies in this region away from absorption edges. The methodology developed can be used for the XAFS analysis of compounds and solutions to investigate structural features, bonding and coordination chemistry.

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“…Comparison between[14] and earlier measurements[20,10,21,17] for copper. Data are compared to theory[3uncertainty given by the region between dashed lines, which increases to 20% near the K-edge.…”

mentioning

confidence: 77%

Atomic form factors and photoelectric absorption cross-sections near absorption edges in the soft X-ray region

Chantler¹

2003

AIP Conference Proceedings

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Reliable knowledge of the complex X-ray form factor [Re(f) and Im(f)] and the photoelectric attenuation coefficient (σ PE) is required for crystallography, medical diagnosis, radiation safety and XAFS studies. Key discrepancies in earlier theoretical work are due to the smoothing of edge structure, the use of non-relativistic wave functions, and the lack of appropriate convergence of wave functions. These discrepancies lead to significant corrections for most comprehensive (i.e. all-Z) tabulations. This work has led to a major comprehensive database tabulation [Chantler, C. T.

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Photon interaction cross-sections and anomalous scattering factors of Cu and Ag

Cited by 12 publications

References 22 publications

Measurement of the x-ray mass attenuation coefficient of silver using the x-ray-extended range technique

Measurement of the x-ray mass attenuation coefficient of silver using the x-ray-extended range technique

Measurement of the X-ray mass attenuation coefficients of silver in the 5–20 keV range

Atomic form factors and photoelectric absorption cross-sections near absorption edges in the soft X-ray region

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