Ultrafast X-Ray Diffraction Studies of the Phase Transitions and Equation of State of Scandium Shock Compressed to 82 GPa
- Univ. of Edinburgh, Scotland (United Kingdom)
- European X-ray Free-Electron Laser (XFEL), Hamburg (Germany)
- Univ. of Oxford (United Kingdom)
- Atomic Weapons Establishment (AWE), Reading (United Kingdom)
- Atomic Weapons Establishment (AWE), Reading (United Kingdom); Imperial College, London (United Kingdom)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Univ. of Edinburgh, Scotland (United Kingdom); Research Complex at Harwell (RCaH), Didcot (United Kingdom)
Using x-ray diffraction at the Linac Coherent Light Source x-ray free-electron laser, we have determined simultaneously and self-consistently the phase transitions and equation of state (EOS) of the lightest transition metal, scandium, under shock compression. On compression scandium undergoes a structural phase transition between 32 and 35 GPa to the same bcc structure seen at high temperatures at ambient pressures, and then a further transition at 46 GPa to the incommensurate host-guest polymorph found above 21 GPa in static compression at room temperature. Furthermore, shock melting of the host-guest phase is observed between 53 and 72 GPa with the disappearance of Bragg scattering and the growth of a broad asymmetric diffraction peak from the high-density liquid.
- Research Organization:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Fusion Energy Sciences (FES); Engineering and Physical Sciences Research Council (EPSRC)
- Grant/Contract Number:
- AC52-07NA27344; AC52-06NA25396; AC02-76SF00515
- OSTI ID:
- 1361149
- Alternate ID(s):
- OSTI ID: 1338660
OSTI ID: 1879797
OSTI ID: 1392882
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 2 Vol. 118; ISSN 0031-9007; ISSN PRLTAO
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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