Ultrafast X-Ray Diffraction of Heterogeneous Solid Hydrogen [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 541.3 Miscellaneous topics in physical chemistry
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Science ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2015
• Mô tả vật lý: Size: 5 p. : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 268203
• Chủ đề: 1. 36 materials science; 2. Fcc lattices; 3. Hcp lattices; 4. Hydrogen; 5. X-ray diffraction

Tóm tắt

Angularly resolved x-ray diffraction at 5.5 keV establishes the structure of a 5 �m diameter solid hydrogen jet, providing a foundation for analysis of hydrogen in a warm dense matter state. The jet was composed of approximately 65 % � 5% HCP and 35 % � 5% FCC by volume with an average crystallite size on the order of hundreds of nanometers. Broadening in the angularly resolved spectrum provided strong evidence for anisotropic strain up to approximately 3 % in the HCP lattice. Finally, we found no evidence for orientational ordering of the crystal domains.