Hugoniot measurements for ammonia borane (BH3NH3) and the behavior of metallic hydrogen in the shocked mixture

POSTER

Abstract

Understanding the behavior of hydrogen in mixtures under extreme conditions is essential in various science areas. We performed laser-shock compression experiments on ammonia borane (BH3NH3) and measured the Hugoniot equation-of-state up to 365 GPa at the Institute of Laser Engineering, the University of Osaka. From the reflectivity behavior of shocked and re-shocked BH3NH3, metallic hydrogen in the mixture could become immiscible below 120 GPa and 9000 K conditions. We also discuss the microscopic detail of the immiscible/miscible metallic hydrogen based on ultrafast X-ray diffraction observations and ab initio molecular dynamics (AIMD) simulations.

*This work was supported by the Japan Society for the Promotion of Science (JSPS) Core-to-core program (Grant No. JPJSCCA20230003), the JSPS KAKENHI (20H00139, 23K20038), and the MEXT Quantum Leap Flagship Program (JPMXS0118067246).

Presenters

  • KAI TAKETOSHI

    • The University of Osaka

Authors

  • KAI TAKETOSHI

    • The University of Osaka

  • Daisuke Murayama

    • The University of Osaka

  • Ryota Iwamoto

    • The University of Osaka

  • Hirotaka Nakamura

    • The University of Osaka

  • Makina Yabashi

    • RIKEN SPring-8 Center

  • Kento Katagiri

    • Stanford University

  • Kohei Miyanishi

    • RIKEN SPring-8 Center

  • Ohmura Satoshi

    • Hiroshima Institute of Technology

  • Ryosuke Kodama

    • The University of Osaka

  • Takayoshi Sano

    • The University of Osaka

  • Toshinori Yabuuchi

    • Japan Synchrotron Radiation Institute (JSRI)

  • Norimasa Ozaki

    • Osaka University
    • The University of Osaka