Ultrafast Thermal Melting in Nonequilibrium Warm Dense Copper

Ultrafast Thermal Melting in Nonequilibrium Warm Dense Copper

The ultrafast dynamics of the loss of crystalline periodicity is investigated in femtosecond laser heated warm dense copper, by the original use of x-ray absorption near-edge specific structures just above the L3 edge. The characteristic time is observed near 1 ps, for specific energy density rangin...

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Bibliographic Details
Published in:Physical review letters Vol. 126; no. 6; p. 065001
Main Authors: Jourdain, N, Lecherbourg, L, Recoules, V, Renaudin, P, Dorchies, F
Format: Journal Article
Language:English
Published: United States American Physical Society 12-02-2021
Subjects:
Copper
Flux density
Laser beam heating
Phase transitions
Physics
X ray absorption
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Summary:The ultrafast dynamics of the loss of crystalline periodicity is investigated in femtosecond laser heated warm dense copper, by the original use of x-ray absorption near-edge specific structures just above the L3 edge. The characteristic time is observed near 1 ps, for specific energy density ranging from 1 to 5  MJ/kg, using ps-resolution x-ray absorption spectroscopy. The overall experimental data are well reproduced with two-temperature hydrodynamic simulations, supporting a thermal phase transition.
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ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.126.065001