Rocking curve calculation for YB66 crystal

The rocking curves of a YB66 crystal were calculated in the wide energy range of 1-2keV using the method that Lee developed. The results show that the energy resolution δE is 0.061eV and the peak reflectivity is 12.0% at the photon energy of 1.1keV, and that the energy resolution δE is 0.053eV and the peak reflectivity is 32.8% at the photon energy of 2.025keV. In the entire energy range of 1-2keV, the energy resolution δE is 0.061eV or less and the peak reflectivity is 12.0% or more, with the peak reflectivity having a maximum at around 1.9keV. The calculated structure factors of the YB66 crystal indicated that YB66 has a strong 400 diffraction due to its characteristic structure in which Y atoms are arranged on the (400) crystal plane or near the (000) and (200) crystal planes. (author)