Vibrational spectroscopic investigations of shock-compressed liquid nitrogen and shock-compressed liquid nitromethane

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5966835

Moore, D S; Schmidt, S C

Vibrational spectra of liquid nitrogen and liquid nitromethane shock compressed to several high pressure/high temperature states were recorded using single-pulse multiplex coherent anti-Stokes Raman scattering. Vibrational frequencies were extracted from the data by computer spectral simulation techniques. Vibrational frequencies of liquid nitrogen were found to increase monotonically up to /approx/17.5 GPa single shock and /approx/30 GPa double shock and then to decrease with further increases in pressure. The consequence of the decrease in vibrational frequency on the Grueneisen mode gamma and its effect on the N/sub 2/ equation-of-state is discussed. A model is developed that includes the thermally-excited vibrational state transitions in the synthesized spectral fits of the nitromethane CARS data. The adequacy of the model for interpretation of CARS spectra in both ambient and shock-compressed nitromethane is discussed. 42 refs., 5 figs., 1 tab.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5966835
• Report Number(s): LA-UR-89-520; CONF-890811-10; ON: DE89007991
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
450100* -- Military Technology
Weaponry
& National Defense-- Chemical Explosions & Explosives
ALKANES
CHEMICAL EXPLOSIVES
COMPRESSION
ELEMENTS
EQUATIONS
EXPLOSIVES
FLUIDS
HYDROCARBONS
METHANE
NITRO COMPOUNDS
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
SHOCK WAVES
SPECTRA