Vibrational Relaxation in Oxygen

Vibrational Energy Transfer and Relaxation in O2and H2O

“…The fit was biased in favor of the high-quality quasi-classical trajectory calculations of Billing and Kolesnick, 21 which are quantitatively consistent with the body of experimental data. Note that the results from the room-temperature sound absorption experiments 13,14 are masked by the overlapping b symbols. In appears clear that the earliest shock-tube measurements, 10 indicated by 0 symbols in Figure 1, are unreliable at lower temperatures.…”

“…VT Relaxation in Pure Oxygen. It is surprising that no critical evaluation has been published that reanalyzes the wealth of information available on reaction 1 from measurements using ultrasound absorption, − shock tubes, − and anti-Stokes Raman scattering in liquid oxygen, − as well as accurate chemical dynamics calculations . Figure illustrates our analysis of the temperature dependence of the rate coefficient for VT vibrational relaxation in oxygen, which is summarized by the empirical formula in which all the numerical constants were adjusted to give the best fit to the point symbols in Figure .…”

“…Shock tube experiments: 0, 10 ], 11 and 4. 12 Sound absorption: 3, 15 plus two measurements13,14 at 300 K that are masked by the overlapping b symbol. Quasi-classical trajectory theory: b 21 and + 26.…”

Non-equilibrium kinetics of bimolecular reactions. Part 7: The puzzle of the H+O2 reaction

“…where [M] is the concentration of the collider M, while is hl 0 the energy di †erence between levels v \ 0 and v \ 1. For O 2 we used the measurements of Lutz and Kiefer,44 augmented at high temperatures by those of Generalov,45 and at low temperatures by those of Holmes et al 46 For Ar as a collision partner we used the data of Camac47 extrapolated modestly to 8000 K. For H as a collision partner there are unfortunately no data available. Instead, we related it to the behavior of as a collision partner.…”

Absorption of Sound in Air below 1000 cps

“…8 and 12 indicates that for a given frequency, the maximum value of absorption in oxygenw a t e r mixture is approximately the same as the maximum value for water vapor and deuterium oxide mixture. However, the curves f o r the oxygen-deuterium oxide mixture have their peaks at significantly lower vapor concentrations.…”