XII. Soft x-ray spectra of magnesium-aluminium, magnesium-silicon and aluminium-silicon alloys

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Abstract
The soft x-ray L spectra of the elements Mg, Al and Si have been determined in all three of the sets of binary alloys, and have been compared with the spectra of the pure elements. Several differences appear : (a) a widening of the emission edges with alloying, (b) in one case a probable diminution of band width and (c) structural changes in the shapes of the bands. We can attempt to understand these effects on the assumption that the alloys consist of two or more phases. Xo case of identity of the bands of the two constituents, such as might be expected from a perfectly ordered single-phase alloy, has been found.

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