X-ray absorption near edge spectroscopy study of warm dense MgO

R. Bolis; J. A. Hernandez; V. Recoules; M. Guarguaglini; F. Dorchies; N. Jourdain; A. Ravasio; T. Vinci; E. Brambrink; N. Ozaki; J. Bouchet; F. Remus; R. Musella; S. Mazevet; N. J. Hartley; F. Guyot; A. Benuzzi-Mounaix

doi:10.1063/1.5105390

X-ray absorption near edge spectroscopy study of warm dense MgO

R. Bolis
, J. A. Hernandez
, V. Recoules
, M. Guarguaglini
, F. Dorchies
, N. Jourdain
, A. Ravasio
, T. Vinci
, E. Brambrink
, N. Ozaki
, J. Bouchet
, F. Remus
, R. Musella
, S. Mazevet
, N. J. Hartley
, F. Guyot
, A. Benuzzi-Mounaix

Université Paris-Saclay
Sorbonne Université
CEA/UVSQ/CNRS
Univ. Bordeaux
Osaka University
LUTH - Laboratoire de l'Univers et de ses Theories
Institute of Radiooncology - OncoRay
Université Pierre et Marie Curie

Research output: Contribution to journal › Article › peer-review

Abstract

We report time-resolved X-ray Absorption Near Edge Spectroscopy (XANES) measurements of warm dense MgO. We used a high power nanosecond pulse to drive a strong uniform shock wave into an MgO sample, and a picosecond pulse to generate a broadband X-ray source near the Mg K-edge. We used this setup to obtain XANES spectra across a large area of the phase diagram, with densities up to 6.8 g/cc and temperatures up to 30 000 K, conditions at which no prior investigations of electronic and ionic structure exist. Our XANES results, together with quantum molecular dynamic simulations, demonstrate that the sample metallizes due to the bandgap closure as it melts, after which it shows typical behavior for a disordered ionic liquid.

Original language	English
Article number	112703
Journal	Physics of Plasmas
Volume	26
Issue number	11
DOIs	https://doi.org/10.1063/1.5105390
Publication status	Published - 1 Nov 2019

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Bolis, R., Hernandez, J. A., Recoules, V., Guarguaglini, M., Dorchies, F., Jourdain, N., Ravasio, A., Vinci, T., Brambrink, E., Ozaki, N., Bouchet, J., Remus, F., Musella, R., Mazevet, S., Hartley, N. J., Guyot, F., & Benuzzi-Mounaix, A. (2019). X-ray absorption near edge spectroscopy study of warm dense MgO. Physics of Plasmas, 26(11), Article 112703. https://doi.org/10.1063/1.5105390

@article{9600da4d6f34421eb68d0f8ed9ecb0f7,

title = "X-ray absorption near edge spectroscopy study of warm dense MgO",

abstract = "We report time-resolved X-ray Absorption Near Edge Spectroscopy (XANES) measurements of warm dense MgO. We used a high power nanosecond pulse to drive a strong uniform shock wave into an MgO sample, and a picosecond pulse to generate a broadband X-ray source near the Mg K-edge. We used this setup to obtain XANES spectra across a large area of the phase diagram, with densities up to 6.8 g/cc and temperatures up to 30 000 K, conditions at which no prior investigations of electronic and ionic structure exist. Our XANES results, together with quantum molecular dynamic simulations, demonstrate that the sample metallizes due to the bandgap closure as it melts, after which it shows typical behavior for a disordered ionic liquid.",

author = "R. Bolis and Hernandez, \{J. A.\} and V. Recoules and M. Guarguaglini and F. Dorchies and N. Jourdain and A. Ravasio and T. Vinci and E. Brambrink and N. Ozaki and J. Bouchet and F. Remus and R. Musella and S. Mazevet and Hartley, \{N. J.\} and F. Guyot and A. Benuzzi-Mounaix",

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doi = "10.1063/1.5105390",

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T1 - X-ray absorption near edge spectroscopy study of warm dense MgO

AU - Bolis, R.

AU - Hernandez, J. A.

AU - Recoules, V.

AU - Guarguaglini, M.

AU - Dorchies, F.

AU - Jourdain, N.

AU - Ravasio, A.

AU - Vinci, T.

AU - Brambrink, E.

AU - Ozaki, N.

AU - Bouchet, J.

AU - Remus, F.

AU - Musella, R.

AU - Mazevet, S.

AU - Hartley, N. J.

AU - Guyot, F.

AU - Benuzzi-Mounaix, A.

PY - 2019/11/1

Y1 - 2019/11/1

N2 - We report time-resolved X-ray Absorption Near Edge Spectroscopy (XANES) measurements of warm dense MgO. We used a high power nanosecond pulse to drive a strong uniform shock wave into an MgO sample, and a picosecond pulse to generate a broadband X-ray source near the Mg K-edge. We used this setup to obtain XANES spectra across a large area of the phase diagram, with densities up to 6.8 g/cc and temperatures up to 30 000 K, conditions at which no prior investigations of electronic and ionic structure exist. Our XANES results, together with quantum molecular dynamic simulations, demonstrate that the sample metallizes due to the bandgap closure as it melts, after which it shows typical behavior for a disordered ionic liquid.

AB - We report time-resolved X-ray Absorption Near Edge Spectroscopy (XANES) measurements of warm dense MgO. We used a high power nanosecond pulse to drive a strong uniform shock wave into an MgO sample, and a picosecond pulse to generate a broadband X-ray source near the Mg K-edge. We used this setup to obtain XANES spectra across a large area of the phase diagram, with densities up to 6.8 g/cc and temperatures up to 30 000 K, conditions at which no prior investigations of electronic and ionic structure exist. Our XANES results, together with quantum molecular dynamic simulations, demonstrate that the sample metallizes due to the bandgap closure as it melts, after which it shows typical behavior for a disordered ionic liquid.

U2 - 10.1063/1.5105390

DO - 10.1063/1.5105390

M3 - Article

AN - SCOPUS:85074780457

SN - 1070-664X

VL - 26

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 11

M1 - 112703

ER -

X-ray absorption near edge spectroscopy study of warm dense MgO

Abstract

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