Evolution of Core States from Energy Bands in the4d5s5pRegion from Pd to Xe

X-ray photoemission studies were performed on the $4d5s5p$ elements Pd through Te using monochromatized Al ($K\alpha$) radiation. With increasing atomic number the $4d$ structure evolves from $d$ bands to spin-orbit—split atomiclike core levels. Structure was observed in the $5s5p$ bands for the first time by this method. The cohesive energy was attributed to the $5p$ bands in In through Sb. Evidence for both bonding and nonbonding $5p$ bands was obtained for Te.