Abstract
Abstract The fluorescent X-ray intensities of nickel-iron-chromium alloys which cover the entire range of the system are obtained by theoretical calculation. The calculated results show that the iron fluorescent X-ray intensity is much affected by the amount of the other elements, while the nickel and chromium fluorescent X-ray intensities are less affected. The calculated results agree with the experimental results; their difference is less than 1%. In the calculations, the intensities of the primary, the secondary, and the tertiary fluorescent X-rays are obtained, where the primary fluorescent X-rays are defined as being excited by incident X-rays only; the secondary fluorescent X-rays as excited by the primary, and the tertiary fluorescent X-rays, as excited by the secondary fluorescent X-rays. The calculated results show that the secondary fluorescent X-rays are significant, but the tertiary fluorescent X-rays form only a small percentage of the total fluorescent X-rays at most.
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