Journal ArticleDOI
Time-resolved Fourier transform infrared spectroscopy of optically pumped carbon monoxide
Elke Plonjes,Peter Palm,Andrey Chernukho,Igor Adamovich,J. William Rich +4 more
- Vol. 256, Iss: 3, pp 315-331
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TLDR
In this article, measurements of vibration-to-vibration (V-V) energy transfer rates for CO-CO using time-resolved step-scan Fourier transform infrared spectroscopy of optically pumped carbon monoxide were discussed.Abstract:
The paper discusses measurements of vibration-to-vibration (V–V) energy transfer rates for CO–CO using time-resolved step-scan Fourier transform infrared spectroscopy of optically pumped carbon monoxide. In the experiments, time evolution of all vibrational states of carbon monoxide excited by a CO laser and populated by V–V processes (up to v∼40) is monitored simultaneously. The V–V rates are inferred from these data using a kinetic model that incorporates spatial power distribution of the focused laser beam, transport processes, and multi-quantum V–V processes. Although the model predictions agree well with the time-dependent step-scan relaxation data, there is variance between the model predictions and the up-pumping data, however. Comparison of calculations using two different sets of V–V rates with experimental spectra showed that the use of the semi-empirical V–V rates of DeLeon and Rich provides better agreement with experiment. It is also shown that the multi-quantum V–V rates among high vibrational quantum numbers, calculated by Cacciatore and Billing, are substantially overpredicted. The results provide some new insight into nonequilibrium vibrational kinetics, and also demonstrate the capabilities of the step-scan Fourier transform spectroscopy for time-resolved studies of molecular energy transfer processes and validation of theoretical rate models.read more
Citations
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Journal ArticleDOI
On the simplified state-to-state transport coefficients
TL;DR: In this article, simplified expressions for the state-to-state transport coefficients are proposed, where the main stress is on the diffusion of vibrational energy, and the role of non-equilibrium vibrational distributions in the diffusion process and heat transfer is estimated.
Journal ArticleDOI
Optical pumping studies of vibrational energy transfer in high-pressure diatomic gases
TL;DR: In this article, spontaneous Raman scattering is used to experimentally determine the vibrational distribution functions of diatomic species in N2/CO and N 2/CO/O2 gas mixtures optically pumped by a CO laser in the pressure range 410-760 torr.
Journal ArticleDOI
Vibrational energy storage in high pressure mixtures of diatomic molecules
Elke Plonjes,Elke Plonjes,Peter Palm,Peter Palm,Wonchul Lee,Matthew Chidley,Igor Adamovich,Walter R. Lempert,J. William Rich +8 more
TL;DR: In this paper, the authors demonstrate that strong vibrational disequilibrium can be sustained in diatomic gas mixtures at pressures up to 1 atm, with only a few Watts laser power available.
Journal ArticleDOI
Coherent anti-Stokes Raman scattering and spontaneous Raman scattering diagnostics of nonequilibrium plasmas and flows
Walter R. Lempert,Igor Adamovich +1 more
TL;DR: A brief review of the theoretical background of CARS, four-wave mixing and Raman scattering, as well as a discussion of experimental techniques and data reduction, are included in this paper.
Journal ArticleDOI
Gas-phase Boudouard disproportionation reaction between highly vibrationally excited CO molecules
TL;DR: In this article, the gas phase Boudouard disproportionation reaction between two highly vibrationally excited CO molecules in the ground electronic state has been studied in optically pumped CO. The reaction activation energy, 11.6± 0.3 eV (close to the CO dissociation energy of 11.09 eV), was evaluated using the statistical transition state theory.
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TL;DR: The Wiley Classics Library as discussed by the authors consists of selected books that have become recognized classics in their respective fields with these new unabridged and inexpensive editions, Wiley hopes to extend the life of these important works by making them available to future generations of mathematicians and scientists.
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