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Spectral intensity distributions from x‐ray tubes. Calculated versus experimental evaluations

1984; Wiley; Volume: 13; Issue: 3 Linguagem: Inglês

10.1002/xrs.1300130309

1097-4539

R. Tertian, N. Broll,

Advanced X-ray and CT Imaging

Abstract Apart from their general importance, an accurate definition of spectral intensity distributions from x‐ray tubes is required to support the development of mathematical matrix correction procedures for x‐ray fluorescence analysis. Since a direct measurement is costly, time consuming and occasionally difficult, and a purely theoretical approach is not suitable for current utilization, a simple, readily adaptable calculation procedure is very desirable. Concerning the continuum or white radiation from the x‐ray tube, such an evaluation was worked out by effecting (1) a modification to Kramers' law and (2) a refinement of the absorption correction regarding the absorption by the target itself. The new equation accounts very closely for the best known, carefully measured and corrected experimental distributions by Brown et al . and Loomis and Keith. Extended experiments are required to ensure systematization, and special steps are needed for the treatment of the characteristic radiation.