5/27/2023 0 Comments Zero background holder xrdThe graph shows the background from ZBH #2 using a 1° divergence aperture (with no divergence Søller slit) and a 0.15° receiving aperture with the diffracted beam monochromator. Also, nanoparticle materials can collect in the polishing marks on the ZBH surface resulting in a change in the ZBH background. ![]() If the ZBH is scratched or marred, then there will no longer be zero diffraction background as diffraction peaks will arise from defects in the quartz. The ZBH is prone to certain types of damage. It shows the general region exposed to X-rays in the most common usage: a 1° divergence aperture with 2θ > 5°. The dark region is where dislocations have been produced in the quartz by the X-rays. The ZBH crystal is mounted in an aluminum frame. The only background produced by the ZBH is that due to the choice of the divergence aperture. ![]() For example, a metallic sample holder would produce diffraction peaks from the polycrystalline metal, and a glass slide would produce an amorphous background. It consists of a single crystal of quartz that is cut and polished in an orientation such that it produces no diffraction peaks. ![]() This image shows a zero background holder (ZBH).
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