Probing Coster-Kronig transitions in aqueous Fe 2+ solution using inverse partial and partial fluorescence yield at the L-edge

Malte D. Gotz, Mikhail A. Soldatov, Kathrin M. Lange, Nicholas Engel, Ronny Golnak, René Könnecke, Kaan Atak, Wolfgang Eberhardt, Emad F. Aziz

Research output: Contribution to journalArticleResearchpeer-review

16 Citations (Scopus)


Specific Coster-Kronig (CK) transitions in 3d transition metals are close to the threshold of energetic possibility, being disallowed in free atoms, while possible in solids. Moreover, they have been shown to be quite sensitive to chemical bonding. Nevertheless, there has been no direct study of such behavior in solution. Here we present an approach to quantify such transitions in solution, by comparing relative fluorescence of different edges to their relative absorption strengths. The difficulties of acquiring a measurement of the absorption in solution are overcome by applying the recently developed method of inverse partial fluorescence yield to a liquid sample using the microjet. This method has been demonstrated on solids to be bulk sensitive and able to obtain absorption spectra free of selfabsorption or saturation effects. We extend this approach to investigate the L-edge of aqueous Fe 2+ using a combination of a soft X-ray light source and a high-resolution X-ray emission spectrometer.

Original languageEnglish
Pages (from-to)1619-1623
Number of pages5
JournalJournal of Physical Chemistry Letters
Issue number12
Publication statusPublished - 21 Jun 2012
Externally publishedYes

Cite this