A Method for analysis of energy-dispersive X-ray diffraction from disordered systems under pressure

Katayama, Yoshinori

Energy-despersive X-ray diffraction method is commonly used for X-ray diffraction measurements using a cubic-type multi-anvil-press because good background elimination and short data acquisition time can be achieved simultaneously. However, diffraction intensity is affected by several energy-dependent factors. Because it is difficult to estimate these factors separately, Tsuji et al., proposed a new empirical method for determination of structure factor of liquids and glasses. Furthermore, Funakoshi et al., developed a Monte Carlo simulation code to carry out the procedure. But these analyses sometimes give unreasonable results. We improved the method by implementing a common normalization method in a new code. The obtained structure factors of silica glass and liquid water at ambient conditions agree well with those reported previously.