FLUORESCENCE YIELD DETECTION - WHY IT DOES NOT MEASURE THE X-RAY-ABSORPTION CROSS-SECTION

MA ARRIO, P SAINCTAVIT, C CARTIER, CT CHEN, Frank de Groot

Research output: Contribution to journalArticleAcademicpeer-review

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 languageEnglish
Pages (from-to)991-995
Number of pages5
JournalSolid State Communications
Volume92
Issue number12
Publication statusPublished - Dec 1994
Externally publishedYes

Keywords

  • E, X-RAY SPECTROSCOPIES
  • SYNCHROTRON RADIATION
  • TRANSITION-METAL COMPOUNDS
  • NICKEL DIHALIDES
  • CORE-LEVEL
  • PHOTOEMISSION
  • SPECTROSCOPY

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