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Shock equation of state of 6LiH to 1.1 TPa.
Shock equation of state of 6LiH to 1.1 TPa.
- Source :
-
Physical Review B . 10/1/2017, Vol. 96 Issue 13, p1-1. 1p. - Publication Year :
- 2017
-
Abstract
- Using laser-generated shock waves, we have measured pressure, density, and temperature of LiH on the principal Hugoniot between 260 and 1100 GPa (2.6-11 Mbar) and on a second-shock Hugoniot up to 1400 GPa to near fivefold compression, extending the maximum pressure reached in non-nuclear experiments by a factor of two. We observe the onset of metal-like reflectivity consistent with temperature-induced ionization of the Li 2s electron, and no sign of additional changes in ionization up to the maximum pressure. Our measurements are in good agreement with gas gun, Z-machine, and underground test data and are accurately described by quantum molecular dynamics simulations. The results confirm the validity of equation of state models built on an average-atom description of the electron-thermal contribution to the free energy and a density-dependent Grüneisen parameter to describe shock response of LiH over this pressure range. [ABSTRACT FROM AUTHOR]
- Subjects :
- *IONIZATION (Atomic physics)
*LITHIUM hydride
*TEREPHTHALIC acid
Subjects
Details
- Language :
- English
- ISSN :
- 24699950
- Volume :
- 96
- Issue :
- 13
- Database :
- Academic Search Index
- Journal :
- Physical Review B
- Publication Type :
- Academic Journal
- Accession number :
- 126717158
- Full Text :
- https://doi.org/10.1103/PhysRevB.96.134101