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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Toleikis, S.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2021Observation of a highly conductive warm dense state of water with ultrafast pump–probe free-electron-laser measurementscitations
- 2018Experimental study of EUV mirror radiation damage resistance under long-term free-electron laser exposures below the single-shot damage thresholdcitations
- 2017Contrasting behavior of covalent and molecular carbon allotropes exposed to extreme ultraviolet and soft x-ray free-electron laser radiationcitations
- 2017Soft x-ray induced femtosecond solid-to-solid phase transitioncitations
- 2014Melting of iron close to Earth's inner core boundary conditions detected by XANES spectroscopy in laser shock experiment
- 2014Hidden Charge States in Soft-X-Ray Laser-Produced Nanoplasmas Revealed by Fluorescence Spectroscopycitations
- 2011Damage threshold of amorphous carbon mirror for 177 eV FEL radiationcitations
- 2011Damage threshold of amorphous carbon mirror for 177 eV FEL radiation
- 2011Damage threshold of amorphous carbon mirror for 177 eV FEL radiationcitations
- 2010Spot size characterization of focused non-Gaussian X-ray laser beamscitations
- 2009Damage of amorphous carbon induced by soft x-ray femtosecond pulses above and below the critical anglecitations
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document
Melting of iron close to Earth's inner core boundary conditions detected by XANES spectroscopy in laser shock experiment
Abstract
When modeling the Earth's interior, essential features lie in our knowledge of iron and iron alloys physical properties at extreme pressures and temperatures. While the density profile of the Earth's interior is rather well constrained from seismic data, the temperature at the boundary between the solid inner core and liquid outer core (ICB, Inner Core Boundary), where the pressure is estimated to be of 330GPa, remains up to now largely uncertain. It corresponds to the melting temperature of an iron alloy containing a small but unconstrained amount of impurities [1]. As a reference, the melting temperature of pure iron at ICB pressure condition is thus one of the most important parameters of earth and planetary interiors physics. For that reason, measuring the iron melting curve at conditions corresponding to the Earth Inner Core Boundary (ICB) under pressure of 330GPa has eluded scientists for several decades. Here we used X-ray Absorption Near Edge Structure (XANES) spectroscopy with ultrafast X-ray Free Electron Laser (XFEL) sources coupled to a laser shock experiment, to detect the state of iron along the shock Hugoniot up to 420GPa (+/- 50) and 10800K (+/- 1390). Our results allows to put an upper constrain on the high pressure-melting curve of iron by detecting well beyond recent diamond-anvil cell measurements performed at 150GPa [2]. [1] J.P. Poirier, Phys. Earth Planet. Int. 85, 319 (1994). [2] S. Anzellini et al., Science 340, 464 (2013)....