Aujourd'hui, les anneaux synchrotrons, tels que l'ESRF à Grenoble ou le synchrotron SOLEIL sur le plateau de Saclay, sont des sources intenses de photons (de l'infra-rouge aux rayons X). De nombreuses équipes de l'IRAMIS réalisent régulièrement des expériences autour de ces sources.
Les effets ioniques dits spécifiques regroupent tous les effets certes d'origine électrostatique mais qui ne peuvent être expliqués par la seule valence des ions.
Melt and fluid inclusions in olivines from the last 197 days long eruption of Piton de la Fournaise (Réunion Island) that began March 9, 1998, have recorded a range of volatile partial pressures.
H. Magnan, A. Barbier ; Coll. P. Le Fèvre, D. Chandesris (Soleil) ; J. Jupille (Institut Nanosciences de Paris) ; S. Bourgeois (LRRS) ; W. Drube (HASYLAB, Hamburg, Germany) ; T. Uozumi (Graduate School Engineering, Osaka, Japan) ; A. Kotani (Spring-8, Hyo
K-edge X-ray absorption and 2p-XPS spectra of 3d-element oxides present spectral features which cannot be explained within a simple one-electron model.
Micro-experimental studies require the use of diamond anvil cells, allowing observation and in situ characterization of the studied phase equilibrium using classical spectroscopy techniques (Infrared, Raman, X-Ray Fluorescence, X-Ray diffraction…).
H. Bureau, B. Ménez, V. Malavergne, A. Somogyi, M. Munoz, A. Simionovici, D. Massare, M. Burchard, S. Kubsky, C. Shaw
Subduction zones are the locations where the oceanic crust, which experienced intense interaction with seawater, is buried back into the Earth’s mantle.
Synchrotron based micro X-ray Absorption Spectroscopy was used to obtain micro scale chemical information such as coordination and oxidation state of phases constituting corrosion products within archaeological iron artefacts buried in soil.
N.T. Barrett, L. Zagonel, S. Palacin, J. Charlier ; Coll. O. Renault, A. Bailly, R. Brochier, A. Chabli (CEA/LETIMinatec) N. Brookes, J. Cezar (ESRF) ; K. Winkler, B. Kromeker, D. Funneman (Omicron) ; S. Poissonet (CEA/SRMP)
Photoelectron emission microscopy combined with intense photon sources is becoming a powerful analytical tool with both spatial resolution down to a few nanometers and spectroscopic capabilities.
Prediction of long term corrosion (on several hundred years) of low alloy steels is a crucial issue in several research domains: metallic cultural heritage conservation, civil engeeniring, etc.