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Characterization of the Ti Kβ spectral profile

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posted on 2013-06-13, 00:00 authored by C T Chantler, L F Smale, J A Kimpton, D N Crosby, M N Kinnane, A J Illig

Table 2. Characterization of the Ti Kβ spectral profile. The profile is fully characterized on an absolute energy scale through a sum of component Lorentzians convolved with a Gaussian instrumental broadening. Integrated areas Ai, centroids Ci and FWHMs Wi of individual components were obtained from a fit of intensity against detector position. The detector position axis was transformed to an absolute energy scale via the calibration procedure. The Gaussian width σ = 1.244(41) eV. The background was B = 831(26) counts. The second and third components are dominant, contributing more than three quarters of the intensity of the spectrum while the fourth component is very weak. The third and fourth component widths are dominated by the Gaussian instrumental width. The first component is very broad relative to the entire Kβ spectrum.


Transition metals have Kα and Kβ characteristic radiation possessing complex asymmetric spectral profiles. Instrumental broadening normally encountered in x-ray experiments shifts features of profiles used for calibration, such as peak energy, by many times the quoted accuracies. We measure and characterize the titanium Kβ spectral profile. The peak energy of the titanium Kβ spectral profile is found to be 4931.966 ± 0.022 eV prior to instrumental broadening. This 4.5 ppm result decreases the uncertainty over the past literature by a factor of 2.6 and is 2.4 standard deviations from the previous standard. The spectrum is analysed and the resolution-free lineshape is extracted and listed for use in other experiments. We also incorporate improvement in analysis applied to earlier results for V Kβ.