期刊
PHYSICAL REVIEW LETTERS
卷 126, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.126.065001
关键词
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资金
- French Agence Nationale de la Recherche [ANR-09-BLAN-0206-01]
- Conseil Regional d'Aquitaine [2010-13-04-002]
- Agence Nationale de la Recherche (ANR) [ANR-09-BLAN-0206] Funding Source: Agence Nationale de la Recherche (ANR)
The ultrafast dynamics of the loss of crystalline periodicity in femtosecond laser heated warm dense copper was studied using x-ray absorption near-edge structures above the L3 edge. A characteristic time of approximately 1 ps was observed for energy densities ranging from 1 to 5 MJ/kg, with the experimental data well reproduced by two-temperature hydrodynamic simulations, indicating a thermal phase transition.
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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