  The magnetic and electronic properties of non-Fermi liquid UCu_4Pd depend on
annealing conditions. Local structural changes due to this annealing are
reported from U L_III- and Pd K-edge x-ray absorption fine-structure
measurements. In particular, annealing decreases the fraction of Pd atoms on
nominally Cu 16e sites and the U-Cu pair-distance distribution width. This
study provides quantitative information on the amount of disorder in UCu_4Pd
and allows an assessment of its possible importance to the observed non-Fermi
liquid behavior.
