Paper AC+TF-MoA6
Observation of Strong Resonant Behavior in the Inverse Photoelectron Spectroscopy of Ce Oxide
Monday, October 18, 2010, 3:40 pm, Room Isleta
| Session: |
Actinide and Rare Earths Thin Films |
| Presenter: |
J.G. Tobin, Lawrence Livermore National Laboratory |
| Authors: |
J.G. Tobin, Lawrence Livermore National Laboratory
S.W. Yu, Lawrence Livermore National Laboratory
B.W. Chung, Lawrence Livermore National Laboratory
G.D. Waddill, Missouri University of Science and Technology
L. Duda, Uppsala University, Sweden
J. Nordgren, Uppsala University, Sweden
|
| Correspondent: |
Click to Email |
X-ray Emission Spectroscopy (XES) and Resonant Inverse Photoelectron Spectroscopy (RIPES) have been used to investigate the photon emission associated with the Ce3d5/2 and Ce3d3/2 thresholds. Strong resonant behavior has been observed in the RIPES of Ce Oxide near the 5/2 and 3/2 edges. Inverse Photoelectron Spectroscopy (IPES) and its high energy variant, Bremstrahlung Isochromat Spectroscopy (BIS), are powerful techniques that permit a direct interrogation of the low-lying unoccupied electronic structure of a variety of materials. Despite being handicapped by counting rates that are approximately four orders of magnitude less that the corresponding electron spectroscopies (Photoelectron Spectroscopy, PES, and X-ray Photoelectron Spectroscopy, XPS) both IPES [1,2,3,4,5] and BIS [6,7,8] have a long history of important contributions. Over time, an additional variant of this technique has appeared, where the kinetic energy (KE) of the incoming electron and photon energy (hv) of the emitted electron are roughly the same magnitude as the binding energy of a core level of the material in question. Under these circumstances and in analogy to Resonant Photoelectron Spectroscopy, a cross section resonance can occur, giving rise to Resonant Inverse Photoelectron Spectroscopy or RIPES. [9-13] Here, we report the observation of RIPES in an f electron system, specifically the at the 3d5/2 and 3d3/2 thresholds of Ce Oxide.
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