Vibrational spectroscopy in shock-compressed liquids
Coherent anti-Stokes Raman spectroscopy is being used to study the structure and energy transfer in simple molecular liquids at the high pressures and temperatures characteristic of explosive detonation. Dense fluids to several thousand degrees temperature and several hundred kilobars pressure are obtained using the shock-compression technique. Vibrational frequencies, third-order susceptibility ratios, and linewidths have been measured for N{sub 2}, O{sub 2}, CO, mixtures of N{sub 2}, O{sub 2}, and CO, and N{sub 2}O. Frequencies are found to increase with pressure. The transition intensity and line-width data suggest that thermal equilibrium of the vibrational levels is attained in less than a few nanoseconds at these high pressures and temperatures. Vibrational temperatures obtained are compared to those derived from equation-of-state calculations.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5543766
- Report Number(s):
- LA-UR-92-120; CONF-920688-3; ON: DE92007713
- Resource Relation:
- Conference: 2. international symposium on intense dynamic loading and its effects, Chengdu (China), 9-12 Jun 1992
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
74 ATOMIC AND MOLECULAR PHYSICS
FLUIDS
RAMAN SPECTROSCOPY
CARBON MONOXIDE
COMPRESSION
ENERGY TRANSFER
EQUATIONS OF STATE
IMPACT SHOCK
LINE WIDTHS
NITROGEN
NITROUS OXIDE
OXYGEN
PRESSURE DEPENDENCE
PULSED IRRADIATION
TEMPERATURE RANGE 1000-4000 K
VIBRATIONAL STATES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
ELEMENTS
ENERGY LEVELS
EQUATIONS
EXCITED STATES
IRRADIATION
LASER SPECTROSCOPY
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
SPECTROSCOPY
TEMPERATURE RANGE
400102* - Chemical & Spectral Procedures
400201 - Chemical & Physicochemical Properties
664400 - Experimentally Derived Information on Atomic & Molecular Properties- (1992-)