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Calculation of x-ray tube spectral distributions

✍ Scribed by A. L. Finkelshtein; T. O. Pavlova

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 119 KB
Volume: 28
Category: Article
ISSN: 0049-8246
DOI: 10.1002/(sici)1097-4539(199901/02)28:1<27::aid-xrs302>3.0.co;2-r

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✦ Synopsis

Two approaches to the calculation of x-ray tube spectral distributions for x-ray Ñuorescence analysis are compared. One of them is the NIST algorithm based both on KramersÏ law for the continuum intensity and a semiempirical ratio between the characteristic lines and the continuum intensity. In the other, the continuum and characteristic spectra are calculated separately just as it is done in electron microprobe analysis. Some improvements concerned with the description of the shape of the continuum spectrum at long wavelength and correction for Ñuorescence excited by the bremsstrahlung spectrum are proposed. The calculations of the continuum intensity and the relationship between the integral continuum and the characteristic line intensities were compared with literature experimental data for Cr, Rh, W, Cu and Mo target tubes. Some estimations of the absolute intensities of x-ray tube spectra are also shown.

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