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Title: Electron-ion temperature equilibration in warm dense tantalum

We present measurements of electron-ion temperature equilibration in proton-heated tantalum, under warm dense matter conditions. Our results agree with theoretical predictions for metals calculated using input data from ab initio simulations. Furthermore, the fast relaxation observed in the experiment contrasts with much longer equilibration times found in proton heated carbon, indicating that the energy flow pathways in warm dense matter are far from being fully understood.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [2] ;  [2] ;  [3] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [8] ;  [9] ;  [10]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Oxford, Oxford (United Kingdom)
  3. Univ. of Michigan, Ann Arbor, MI (United States)
  4. AWE Plc., Reading (United Kingdom); Univ. of Warwick, Coventry (United Kingdom)
  5. AWE Plc., Reading (United Kingdom)
  6. Univ. of Warwick, Coventry (United Kingdom)
  7. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  8. GSI Helmholtzzentrum fur Schwerionenforschung GmbH, Darmstadt (Germany)
  9. Max-Planck-Institut fur Physik Komplexer Systeme, Dresden (Germany)
  10. Imperial College, London (United Kingdom)
Publication Date:
OSTI Identifier:
1259787
Report Number(s):
LLNL-JRNL--686300
Journal ID: ISSN 1574-1818
Grant/Contract Number:
AC52-07NA27344
Type:
Accepted Manuscript
Journal Name:
High Energy Density Physics
Additional Journal Information:
Journal Volume: 14; Journal Issue: C; Journal ID: ISSN 1574-1818
Publisher:
Elsevier
Research Org:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 36 MATERIALS SCIENCE electron-ion equilibration; temperature relaxation; warm dense matter