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A thick unordered Tl film has been deposited on Pt(111). Photoemission with photon energies between 20 eV and 27 eV reveals two peaks due to emission from the 5d3/2-and the 5d5/2-levels of Tl. The measurements are performed with circularly polarized radiation. Spin analysis allows separation of the photoelectron intensityI into its partsI+ with spin polarization vector parallel andI− antiparallel to the photonspin. For thed3/2-and thed5/2-level the ratioI+/I− turns out to be approximately 3∶1 and 1∶1.8 respectively. These values are close to the values expected ford-level photoionization of free atoms if spin orbit interaction in the final states is neglected. A slight crystal field splitting of 0.2 eV is observed for thed5/2-level. The data are compared with results for the photoemission from Pb films [1] and data for the photoionization from thed-levels of Hg [2].

Spin polarization in the photoemission from the 5d-core levels of a thallium film