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Title: Liquid Structure of Shock-Compressed Hydrocarbons at Megabar Pressures

Journal Article · · Physical Review Letters
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [6];  [6];  [8];  [6];  [6];  [9];  [6];  [10];  [6];  [11];  [3];  [4];  [5] more »;  [4];  [6];  [6];  [4] « less
  1. Helmholtz-Zentrum Dresden-Rossendorf, Dresden (Germany); Osaka Univ., Suita (Japan). Open and Transdisciplinary Research Inst.
  2. Helmholtz-Zentrum Dresden-Rossendorf, Dresden (Germany)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Helmholtz-Zentrum Dresden-Rossendorf, Dresden (Germany); TU Dresden (Germany)
  5. Univ. of California, Berkeley, CA (United States). Dept. of Physics
  6. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  7. TU Darmstadt (Germany); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  8. Univ. of Warwick, Coventry (United Kingdom). Centre for Fusion, Space and Astrophysics. Dept. of Physics
  9. SLAC National Accelerator Lab., Menlo Park, CA (United States); Univ. of Michigan, Ann Arbor, MI (United States)
  10. SLAC National Accelerator Lab., Menlo Park, CA (United States); European XFEL GmbH, Schenefeld (Germany)
  11. GSI Helmholtz Centre for Heavy Ion Research, Darmstadt (Germany)
+ Show Author Affiliations

We present here results for the ionic structure in hydrocarbons (polystyrene, polyethylene) that were shock compressed to pressures of up to 190 GPa, inducing rapid melting of the samples. The structure of the resulting liquid is then probed using in situ diffraction by an x-ray free electron laser beam, demonstrating the capability to obtain reliable diffraction data in a single shot, even for low-Z samples without long range order. The data agree well with ab initio simulations, validating the ability of such approaches to model mixed samples in states where complex interparticle bonds remain, and showing that simpler models are not necessarily valid. While the results clearly exclude the possibility of complete carbon-hydrogen demixing at the conditions probed, they also, in contrast to previous predictions, indicate that diffraction is not always a sufficient diagnostic for this phenomenon.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); University of California, Berkeley, CA (United States); Helmholtz-Zentrum Dresden-Rossendorf, Dresden (Germany); Osaka Univ., Suita (Japan)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Fusion Energy Sciences (FES); LLNL Laboratory Directed Research and Development (LDRD) Program; Helmholtz Association (Germany); German Federal Ministry of Education and Research (BMBF); Japan Society for the Promotion of Science (JSPS)
Grant/Contract Number:
AC02-76SF00515; AC52-07NA27344; SC0018298; VH-NG-1141; 16K17846; 05P15RDFA1
OSTI ID:
1490403
Alternate ID(s):
OSTI ID: 1486909
Journal Information:
Physical Review Letters, Vol. 121, Issue 24; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

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Cited By (4)

Equations of state for polyethylene and its shock-driven decomposition products journal July 2019
Evidence for Crystalline Structure in Dynamically-Compressed Polyethylene up to 200 GPa text January 2019
High Pressure Hydrocarbons Revisited: From van der Waals Compounds to Diamond journal May 2019
Evidence for Crystalline Structure in Dynamically-Compressed Polyethylene up to 200 GPa journal March 2019

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Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
high-energy-density plasmas
plasma production & heating by shock waves & compression
shock waves
carbon-based materials
liquids
density functional theory
X-ray diffraction