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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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Vinci, Tommaso
École Polytechnique
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2024Shock-driven amorphization and melt in Fe$_2$O$_3$
- 2023Transonic dislocation propagation in diamond.citations
- 2023Zr-based metallic glasses Hugoniot under laser shock compression and spall strength evolution with the strain rate >10$^7$ s$^{-1}$)citations
- 2023Zr-based metallic glasses Hugoniot under laser shock compression and spall strength evolution with the strain rate (> 107 s-1)citations
- 2023Transonic dislocation propagation in diamondcitations
- 2022Zr-based bulk metallic glasses equation of state under laser shock compression and spall strength
- 2022Zr-based bulk metallic glasses equation of state under laser shock compression and spall strengths.
- 2021Spin State of Iron in Dynamically Compressed Olivine Melt
- 2021Metallization of Shock-Compressed Liquid Ammoniacitations
- 2021X-ray powder diffraction in reflection geometry on multi-beam kJ-type laser facilitiescitations
- 2020Equation of state and electrical conductivity of warm dense ammonia at the conditions of large icy planets' interiors.
- 2020In situ X-ray diffraction of silicate liquids and glasses under dynamic and static compression to megabar pressurescitations
- 2020Direct Observation of Shock‐Induced Disordering of Enstatite Below the Melting Temperaturecitations
- 2020Ultrafast X-ray Diffraction Measurements Of shock-Compressed Fe and Fe-Si Alloys
- 2017Shock response to solid germanium
- 2016Direct structural investigation of shock compressed silicates from x-ray diffraction
- 2016Kinetics of the iron α -∊ phase transition at high-strain rates: Experiment and modelcitations
- 2014Melting of iron close to Earth's inner core boundary conditions detected by XANES spectroscopy in laser shock experiment
- 2010Large scale simulations of quasi-isentropic compression in Fe and Al
- 2009Microstructural investigation of melting in laser-shocked recovered iron foils
- 2006Laser-driven shock waves for the study of extreme matter statescitations
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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)....