RESONANT X-RAY-EMISSION OF HEXAGONAL BORON-NITRIDE (H-BN) IN BK-EXCITATION USING UNDULATOR RADIATION

The high-energy satellite structure in the BK(alpha) X-ray emission spectrum of hexagonal boron nitride (h-BN) has been measured by threshold excitation methods. Prominent X-ray emission of the high-energy satellite peaks was observed when the excitation energy was tuned to the pi*- and sigma*-absorption peaks. The spectral profile of the scattered radiation was also similar to the absorption spectrum. Therefore, the origin of the high-energy satellites is found to be the unshifted resonant X-ray emission of B(1s)-(unoccupied anti-bonding pi* and/or sigma* orbitals)-B(1s-1) transition, which could be explained by the resonant X-ray Raman scattering.