High temperature photoelectron spectroscopy: A study of U, UO, and UO/sub 2/
The He I photoelectron spectrum of atomic uranium has been recorded in the vapor phase. Bands associated with metal (6d)/sup -1/, (7s)/sup -1/, and (5f)/sup -1/ ionizations were observed. The relative intensities of the (6d)/sup -1/ and (5f)/sup -1/ bands are consistent with computed relative cross sections at the He I energy, whereas the intensity of the (7s)/sup -1/ band is larger than expected from computed cross sections, implying enhancement of this feature by autoionization effects. HeI photoelectron spectra have also been recorded for the vapor above a heated equimolar UO/sub 2/(s):U(s) mixture. By studying the spectra obtained as a function of temperature, bands associated with UO and UO/sub 2/ were identified and these were assigned using relativistic Hartree--Fock--Slater calculations on these molecules.
- Research Organization:
- Central Electricity Generating Board, Berkeley Nuclear Laboratories, Berkeley, Gloucestershire, GL13 9PB, United Kingdon
- OSTI ID:
- 6930591
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 89:9; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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ACTINIDE COMPOUNDS
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