Recent developments in high-resolution gas phase studies using synchrotron radiation |
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| Catalin Miron | |
| Synchrotron SOLEIL, Gif-sur-Yvette | |
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Electron spectroscopy is an excellent analytical tool to characterize materialís chemical composition or degree of oxidation [1]. At ultra-high resolution inner-shell electron and coinci-dence spectroscopies provide an accurate probe of ultrafast (fs) decay dynamics, in particular for isolated species [2]. New scientific opportu-nities are being offered by the most recent x-ray sources coupled to state-of-the-art instrumenta-tion, such as the PLEIADES [3] beamline at SOLEIL. Examples will be shown from a wide panel of studies where high-resolution spectroscopies have been employed to investigate fundamental properties of matter, such as the Vibrational Scattering Anisotropy (VSA) [4,5], the Auger-Doppler effect using circularly polarized light [6], or the rotational Doppler broadening of mo-lecular electron spectra [7]. Very recently, we have shown that ultrahigh resolution resonant photoemission can be applied to molecular po-tentialsí imaging [8], and that the photoioniza-tion cross sections cannot be always related to stoichiometry in a simple way [9]. We applied Auger electron-ion coincidence measurements to the investigation of the complex decay mech-anisms of both simple diatomic [10] as well as more complex polyatomic core-excited mole-cules [11]. [1] K. Siegbahn et al., ESCA. Atomic, Molecular and Solid State Studied by Means of Electron Spectros-copy, Almqvist and Wiksells, Uppsala (1967). |