Pair distribution function
= Pair distribution function
{wiki=Pair_distribution_function}
The pair distribution function (PDF), often denoted as \\( g(r) \\), is a statistical measure that describes how the density of particles varies as a function of distance from a reference particle in a many-body system. In simple terms, it gives information about the spatial arrangement of particles in a system, such as liquids, gases, and solids.