2026-06-20T12:20:23Z
https://icatplus.esrf.fr/oaipmh/request
oai:icatplus.esrf.fr:inv/2020725532
2025-04-01T18:57:38.521Z
4.2
EI
10.15151/ESRF-ES-2020725532
Xiang LI
Xiang
Li
0000-0003-3259-1784
Xiang LI
Xiang
Li
0000-0003-3259-1784
DENNIS KOSOBOKOV
Dennis
Kosobokov
DENNIS KOSOBOKOV
Dennis
Kosobokov
Georgios APRILIS
Georgios
Aprilis
0000-0002-0020-9125
Ilya KUPENKO
Ilya
Kupenko
0000-0003-3783-8360
Ilya KUPENKO
Ilya
Kupenko
0000-0003-3783-8360
Susanne MÜLLER
Susanne
Müller
Susanne MÜLLER
Susanne
Müller
PRESHTIBYE RAGGOO
Preshtibye
Raggoo
PRESHTIBYE RAGGOO
Preshtibye
Raggoo
Hydrogen in the Earth’s core: Sound velocities of hydrogen bearing Fe-Si-alloys at extreme conditions
Example Institute
2028
Data from large facility measurement
2025-03-25T07:00:00Z/2025-03-31T06:00:00Z
2025-03-31T06:00:00Z
I
CC-BY-4.0
In this experiment, we aim to investigate the density as well as the electronic, elastic and thermodynamic properties of hydrogen-bearing Fe-Si-alloys at pressures above 300 GPa and temperatures up to several thousands of degrees. Therefore, nuclear inelastic scattering (NIS) and powder x-ray diffraction (XRD) are planned to be used. Applying the NIS technique brings the advantage of studying the lattice dynamics in order to gain the thermodynamic sample characterization. The measured phonon density of states provides the average Debye phonon velocity (vD), which is necessary to calculate the compressional (vp) and shear velocity (vs) of the material, in combination with the density and bulk modulus obtained by XRD. The measurements and following calculations will allow us to refine the amount of hydrogen and silicon in the Earth’s core, to explain its observed seismic parameters.