Coherent anti-Stokes Raman spectroscopy of shock-compressed liquid carbon monoxide

Journal Article · Tue Oct 15 00:00:00 EDT 1991 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.461634· OSTI ID:5221137

Moore, D S; Schmidt, S C; Shaw, M S; Johnson, J D ^[1]

---

1. Los Alamos National Laboratory, Los Alamos, New Mexico (USA)

Vibrational spectra of liquid carbon monoxide shock compressed to several high pressure/high temperature states were recorded using single-pulse multiplex coherent anti-Stokes Raman scattering. Vibrational frequencies, third-order suceptibility ratios, and linewidths are reported for the fundamental and first excited-state transition. The observed vibrational frequency shift with shock pressure was substantially less than that observed previously in nitrogen, implying a significant difference in the details of their inter- and intramolecular potentials. The transition intensity and linewidth data suggest that thermal equilibrium of the vibrational levels is attained in less than 10 ns at these shock pressures, and the vibrational temperatures obtained are comparable to calculated equation-of-state temperatures. The measured linewidths suggest that the vibrational dephasing time decreased to {similar to}2 ps at our highest pressure shock state.

• OSTI ID: 5221137
• Journal Information: Journal of Chemical Physics; (United States), Journal Name: Journal of Chemical Physics; (United States) Vol. 95:8; ISSN JCPSA; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COMPRESSION
ENERGY LEVELS
EQUATIONS
EQUATIONS OF STATE
EXCITED STATES
FLUIDS
INTERMOLECULAR FORCES
LASER SPECTROSCOPY
LINE WIDTHS
LIQUIDS
OPTIMIZATION
OXIDES
OXYGEN COMPOUNDS
PRESSURE DEPENDENCE
RAMAN SPECTROSCOPY
SHOCK WAVES
SPECTRAL SHIFT
SPECTROSCOPY
VIBRATIONAL STATES