Effect of inaccessible volume on intensity statistics — atoms in fixed special positions

Abstract

The effect of heavy atoms at fixed special positions on the cumulative distribution function N(z) of the normalised intensity z has been studied under the assumption that the heavy atoms are surrounded by inaccessible volumes which are excluded by light atoms in the unit cell. In an earlier work, the expected value of the random variable - the mean value of the structure factor of the light atoms was assumed to be zero. This restriction has now been removed. It is observed that this has a significant effect on the cumulative distribution function of normalised intensity.