Charge-transfer-induced multiplet structure in the {ital N}{sub 4,5}{ital O}{sub 2,3} soft-x-ray emission spectrum of lanthanum
- National Institute of Standards and Technology, Technology Administration, U.S. Department of Commerce, Gaithersburg, Maryland 20899 (United States)
- University of Tennessee, Knoxville, Tennessee 37996 (United States)
Soft-x-ray emission spectra for the La {ital N}{sub 4,5}{ital O}{sub 2,3} transitions in lanthanum aluminate LaAlO{sub 3} include contributions from several relatively intense multiplet lines near 80 eV. The appearance of this spectrum contrasts sharply with the three diagram lines observed for the {ital N}{sub 4,5}{ital O}{sub 2,3} emission spectrum of Ba in BaF{sub 2}. An atomic model of the La {ital N}{sub 4,5}{ital O}{sub 2,3} transition, assuming single occupancy of the 4{ital f} shell by a spectator electron, provides a good approximation of the measured spectrum. Emission features due to the low-energy {sup 3}{ital P}{sup {ital o}} and {sup 3}{ital D}{sup {ital o}} terms of the 4{ital d}{sup 9}4{ital f} configuration are also apparent in the LaAlO{sub 3} emission spectra, but not in emission spectra from BaF{sub 2}. Reflection measurements indicate that the 4{ital f} level is not occupied in the ground state in LaAlO{sub 3}. The data suggest that charge transfer from ligand orbitals following creation of a 4{ital d} vacancy prior to the emission process is the predominant mechanism giving rise to the required 4{ital f} occupancy.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 151393
- Journal Information:
- Physical Review A, Vol. 52, Issue 6; Other Information: PBD: Dec 1995
- Country of Publication:
- United States
- Language:
- English
Similar Records
M/sub 4,5/N/sub 4,5/X Auger line shapes of La compounds from one-step model calculations
M/sub 4,5/N/sub 4,5/X Auger electron spectra of iodine and xenon Many-body effects