X-ray reflectivity of cobalt and titanium in the vicinity of the L2,3absorption edges

Abstract
X-ray reflectivity across cobalt and titanium L2,3 absorption edges was measured as a function of energy by means of continuous radiation from a tungsten anode in a grating spectrometer. The real and imaginary parts of the refractive index were obtained from the absorption curves and an exact Kramers-Kronig analysis. A measured fine structure in the reflected intensities was interpreted as an effect of white lines in the absorption spectra. The X-ray intensity was calculated as a function of energy by means of the Fresnel formula.