The degree of interchain packing in solid polyethylene (PE) amorphized by &ggr; irradiation has been analyzed by the x‐ray diffraction method. The differential radial distribution function (DRDF) of amorphous PE has revealed that the short‐range order in interchain packing exists as wide as 20 A˚, which depends, however, slightly on the dose of irradiation. Parseval’s relation has proved the adequacy of the DRDF obtained.