Abstract
Circularly polarized synchrotron radiation of BESSY and spin-resolved photoemission have been used for a study of the electronic structure of Pd in Λ-direction. The photon energies were chosen between the photoemission threshold at 5.7 and 23 eV. We used the highly symmetric experimental setup of normal light incidence and normal photoelectron emission and studied transitions from the two Λ 3 6/Λ 3 4.5-band-pairs split by spin-orbit interaction. Though the magnitude of the spin-orbit splittings Δ E so in this medium- Z material is smaller than lifetime broadening, it is feasible to resolve the spin-orbit splitting of the initial states via photoelectron spin analysis. The data are consistent with a bandstructure calculation of Noffke and Eckardt except for an energy dependent shift of 0.4 to 1.1 eV of the final bands towards higher energies. In the occupied part of the bandstructure an avoided crossing could be identified. Surface- (bandgap-) emission was observed for photon energies below 7.8 eV.
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