Soft X-ray Studies of Pu Electronic Structure: Past Lessons and Future Directions
- LLNL, Livermore, CA, 94550 (United States)
Photoelectron Spectroscopy (PES) and X-ray Absorption Spectroscopy (XAS) have contributed greatly to our improved understanding of Pu electronic structure. From these and related measurements, the following has been determined. 1. The Pu 5f spin-orbit splitting is large. 2. The number of Pu 5f electrons is near 5. 3. The Pu 5f spin-orbit splitting effect dominates 5f itinerancy. Significant questions remain concerning the nature of Pu electronic structure. Perhaps the missing piece of the puzzle is the direct experimental determination of the unoccupied electronic structure using high energy inverse photoelectron spectroscopy or Bremsstrahlung Isochromat Spectroscopy (BIS). Past BIS studies of Th and U indicate the feasibility and utility of Pu studies. To this end, a new BIS capability has been developed in our laboratory. Electron stimulated emission of photons has been carried out using the XES-350 monochromator and detector system. Some of our preliminary results are shown, using an electron excitation beam energy of 3000 eV. (authors)
- Research Organization:
- Materials Research Society, 506 Keystone Drive, Warrendale, PA, 15086-7573 (United States)
- OSTI ID:
- 21091542
- Resource Relation:
- Conference: Symposium Actinides 2008 - Basic Science, Applications and Technology, San Francisco, CA (United States), 24-28 Mar 2008; Other Information: Country of input: France; 7 refs.; Full text available at: http://www.mrs.org/s{sub m}rs/bin.asp?CID=12409&DID=211495&DOC=FILE.PDF; Related Information: In: Proceedings of the symposium Actinides 2008 - Basic Science, Applications and Technology, by Chung, B.; Thompson, J.; Shuh, D.; Albrecht-Schmitt, T.; Gouder, T. (eds.), v. 1104, [260] pages.
- Country of Publication:
- United States
- Language:
- English
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