Optical Constants Of Float Glass, Nickel, And Carbon From Soft-X-Ray Reflectivity Measurements

Angular-dependent reflectivity was measured with a dynamic range of 5-6 orders of magnitude at similar to 20 different photon energies in the range form 40 to 800 eV. Several float glass substrates and a number of sputtered Ni and C films were investigated to improve the accuracy. The optical constants were obtained from least-squares fits of theoretical reflectivity curves, taking into account the influence of film thicknesses and surface and interface roughnesses.