特邀报告专家：北京高压科学研究中心、日本大阪大学Toshimori Sekine教授

时间：2026.8.25 下午 2:00-3:00

地点: 四川大学望江校区西五教319会议室

摘要：Recent advanced technologies of high-power lasers and related proving methods enable us to characterize the extreme states of shocked materials including warm dense matter. High power pulsed laser makes strong shock wave that achieves high pressure and high temperature state in nanoseconds and X-ray free electron lasers (XFELs) are extreme bright and short X-ray sources for understanding the shocked states. The shock compressed state is proved by optical methods to determined pressure, density, and temperature as well as some physical properties and atomic-level structural information. The results can be applied to simulate condensed matter physics and chemistry, natural impact conditions, and planetary interiors. My talk will introduce some recent experimental results and applications. 

Recent selected publications:

Y. Umeda, et al. (2026) Structural Evolution of Antigorite by High-Velocity Impacts. J. Geophys. Res. Solid Earth 131, e2026JB034623.

T. Sekine et al. (2026) Redox reactions in the outermost thin surfaces of meteorite fusion crusts. Geochim. Cosmochim. Acta 418, 257-264.

L. Sun et al. (2025) Investigation of Dynamics of materials under laser-induced extreme conditions. Matter Radiation Extremes 10, 063002.

U. Umeda, et al. (2025) In situ observation of shock-induced structural evolution of calcite. Phys. Chem. Minerals, 52, 20.

X. Feng, et al. (2025) Nanosecond structural evolution in shocked coesite. Science Advances, 11, eads3139.

J. Song, et al. (2025) The Hugoniot curve and sound velocity of forsterite to 1200 GPa. Geoscience Frontiers, 16, 101917.

X. Feng et al. (2024) Shock compression of coesite up to 950 GPa. Geophys. Res. Lett., 51, e2024GL109873.

L. Sun et al. (under review) Diamond melting and thermodynamic evidence for BC8 at terapascal pressures. The Innovation.

T. Okuchi et al. (2021) Ultrafast olivine-ringwoodite transformation during shock compression. Nature communications, 12, 4305.

H. Hwang, et al. (2020) Sub-nanosecond phase transition dynamics in laser-shocked iron. Science Advances, 6, eaaz5132.