Sound velocities in shocked liquid deuterium
- Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
Recent measurements of shock temperatures and laser-driven Hugoniot measurements of shocked liquid deuterium strongly indicate that molecular dissociation is important above 20 GPa. Since the effect of dissociation is small on the Hugoniot pressure up to the 30 GPa limit of conventional impact experiments, other methods must be used to test our understanding of the physics of highly compressed deuterium in this regime. We have recently performed experiments to measure the sound velocity of deuterium which test the isentropic compressibility, a derivative quantity. We used the shock overtake method to measure the shock velocity at 28 GPa. These preliminary data provide support for a recently developed molecular dissociation model. {copyright} {ital 1998 American Institute of Physics.}
- Research Organization:
- Lawrence Livermore National Laboratory
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 295452
- Report Number(s):
- CONF-970707--
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 429; ISSN 0094-243X; ISSN APCPCS
- Country of Publication:
- United States
- Language:
- English
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