Vibrational spectroscopy in shock-compressed liquids

Conference · Sun Mar 01 00:00:00 EST 1992

OSTI ID:10123477

Schmidt, S C; Moore, D S

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, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 10123477
• 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; Other Information: PBD: [1992]
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
74 ATOMIC AND MOLECULAR PHYSICS
FLUIDS
RAMAN SPECTROSCOPY
ENERGY TRANSFER
TEMPERATURE RANGE 1000-4000 K
VIBRATIONAL STATES
EQUATIONS OF STATE
NITROGEN
OXYGEN
CARBON MONOXIDE
NITROUS OXIDE
COMPRESSION
LINE WIDTHS
PRESSURE DEPENDENCE
IMPACT SHOCK
PULSED IRRADIATION
400102
400201
664400
CHEMICAL AND SPECTRAL PROCEDURES
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES
EXPERIMENTALLY DERIVED INFORMATION ON ATOMIC AND MOLECULAR PROPERTIES