Valence-Band UPS, 6$p$ Core-Level XPS Photoemission Spectroscopy, and   Low-Energy Electron Diffraction of a Uranium (001) Single Crystal
  Valence-band ultraviolet photoemission spectroscopy (UPS) at 173K and 6p core-level X-ray photoemission spectroscopy (XPS) at room temperature were performed on a high quality uranium single crystal. Significant agreement is found with first-principles electronic band-structure calculations, using a generalized gradient approximation (GGA). In addition, using Low Energy Electron Diffraction (LEED) for the (001) surface, we find a well-ordered orthorhombic crystallographic structure representative of the bulk material. 
C.P. Opeil, R.K. Schulze, M.E. Manley, J.C. Lashley, W.L. Hults, R.J.   Hanrahan, Jr., J.L. Smith, B. Mihaila, K.B. Blagoev,...