Structure in LEED Bragg reflexes of spherical Ag crystals

LEED at room temperature is performed on spherically-shaped silver crystals grown by solidification of a drop of melt. The domains of intensity in the reciprocal lattice, which are usually rodlike, change to double cones caused by the crystal sphere. The size and the structure of Bragg reflexes were studied as a function of primary electron energy and diffraction geometry. The influence of impurities on the diffraction patterns is examined.