Abstract
It is shown that fluorescence yield (FY) detection does not measure a pure X-ray absorption spectrum if multiplet effects are important. The reason is that while the Auger decay is approximately constant, the fluorescence decay shows a strong dependence on the final state. With a coherent description of the X-ray absorbtion and X-ray emission processes, the observed differences between TEY and FY detected nickel 2p edges can be reproduced accurately. In the, approximate, incoherent description the FY spectral shape identifies with the X-ray absorption spectrum multiplied with its state dependent fluorescence decay. Self-absorption effects are calculated and the implications for X-ray Magnetic Circular Dichroism (X-MCD) and generalisations to other systems are discussed.
Original language | English |
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Pages (from-to) | 991-995 |
Number of pages | 5 |
Journal | Solid State Communications |
Volume | 92 |
Issue number | 12 |
Publication status | Published - Dec 1994 |
Externally published | Yes |
Keywords
- E, X-RAY SPECTROSCOPIES
- SYNCHROTRON RADIATION
- TRANSITION-METAL COMPOUNDS
- NICKEL DIHALIDES
- CORE-LEVEL
- PHOTOEMISSION
- SPECTROSCOPY