Angle-resolved photoemission fromγ-Ce: Distinguishing band peaks fromf-electron emission

Angle-resolved photoemission spectra from single crystal $\gamma$-Ce(100) are presented and discussed. Valence-band peaks are observed for photon energies below 40 eV. These peaks disperse with electron exit angle and obey simple one-electron selection rules. For photon energies above 50 eV, two peaks, at the Fermi level and at 2-eV binding energy, dominate the spectra. These peaks do not disperse, and do not obey the one-electron selection rules. They are identified as atomiclike $4f$ emission.