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3. C. J. Powell, National Institutes of Science and Technology, Gaithersburg, MD 20899, USA, and S. Tanuma, Central Research Laboratories, Nippon Mining Company, Ltd., 3–17-35 Niizo-Minami, Toda, Saitama 335, Japan, private communication.
4. B. L. Henke, J. C. Davis, E. M. Gullikson, and R. C. C. Perera, “A preliminary report on x-ray photoabsorption coefficients and atomic scattering factors for 92 elements in the 10–10000 eV region,” Lawrence Berkeley Laboratory Report 26259, Nov. 1988, Berkeley, CA.