title: Optical properties of boron carbide near the boron K edge evaluated by soft-x-ray reflectometry from a Ru/B(4)C multilayer.
abstract: Soft-x-ray Bragg reflection from two Ru/B(4)C multilayers with 10 and 63 periods was used for independent determination of both real and imaginary parts of the refractive index n = 1 - delta + ibeta close to the boron K edge (approximately 188 eV). Prior to soft x-ray measurements, the structural parameters of the multilayers were determined by x-ray reflectometry using hard x rays. For the 63-period sample, the optical properties based on the predictions made for elemental boron major deviations were found close to the K edge of boron for the 10-period sample explained by chemical bonding of boron to B(4)C and various boron oxides.
authors.affiliation: University of Siegen, Walter-Flex Strasse 3, 57068 Siegen, Germany. ksenzov@physik.uni-siegen.de
authors.forename: Dmitriy
authors.initials: D
authors.lastname: Ksenzov
authors.forename: Tobias
authors.initials: T
authors.lastname: Panzner
authors.forename: Christoph
authors.initials: C
authors.lastname: Schlemper
authors.forename: Christian
authors.initials: C
authors.lastname: Morawe
authors.forename: Ullrich
authors.initials: U
authors.lastname: Pietsch