White-line evolution in shocked solid Ta evidenced by synchrotron x-ray absorption spectroscopy

Time-resolved x-ray absorption experiments have been performed on shocked tantalum. Using a single 100 ps synchrotron x-ray pulse, nanosecond-lived equilibrium states of shocked solid Ta have been measured by L3-edge absorption spectroscopy. The energy shift and intensity change of the white line we...

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Bibliographic Details
Published in:Physical review. B 2020-10, Vol.102 (14), Article 144102
Main Authors: Pépin, C. M., Torchio, R., Occelli, F., Lescoute, E., Mathon, O., Recoules, V., Bouchet, J., Videau, L., Benuzzi-Mounaix, A., Vinci, T., Briggs, R., Pascarelli, S., Gaal, R., Loubeyre, P., Sollier, A.
Format: Article
Language:English
Subjects:
Absorption spectroscopy
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Density functional theory
MATERIALS SCIENCE
Physics
Plasma Physics
Spectrum analysis
Synchrotron radiation
Synchrotrons
Tantalum
X ray absorption
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Summary:Time-resolved x-ray absorption experiments have been performed on shocked tantalum. Using a single 100 ps synchrotron x-ray pulse, nanosecond-lived equilibrium states of shocked solid Ta have been measured by L3-edge absorption spectroscopy. The energy shift and intensity change of the white line were measured up to 130 GPa and 2000 K. The experimental results are discussed in light of density functional theory calculations and FEFF simulations. The absence of occurrence of the hcp-ω phase is suggested from the analysis of the shape of the white line.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.102.144102