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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Relaxation, incubation, and dissociation in CO2
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Relaxation, incubation, and dissociation in CO2

机译：二氧化碳中的松弛，孵育和解离

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摘要

The dissociation and relaxation of CO2 has been reexamined in the incident shock wave with the laser-schlieren technique. These new experiments covered 1377-6478 K, and 42-750 Torr, and improvements partly described herein have permitted accurate determination of both rate and incubation time. In general the steady rate measurements are in agreement with other recent determinations. The one anomaly is that the new rates are not fully second order; they vary about 50% over 70-600 Torr. This unexpected feature is actually quite consistent with the recent literature, which shows a similar trend. However, attempts to produce this result with RRKM calculations were unsuccessful. Relaxation times are in agreement with available literature, and incubation time to relaxation time ratios lie between 1.5 and 3 over 4000-6600 K, consistent with findings for other molecules. These ratios are much smaller than those recently derived from reflected-shock experiments by Oehlschlaeger et al. (Z. Phys. Chem. 2005, 219, 555). A simple argument suggests such large values are indeed anomalous, although why they are too large is not clear.
机译：激光冲击波技术已重新检查了入射冲击波中的CO2的分解和弛豫。这些新的实验覆盖了1377-6478 K和42-750 Torr，本文部分描述的改进可以精确测定速率和孵育时间。通常，稳态速率测量与其他最近的确定一致。一个异常是，新利率并非完全是二阶。它们在70-600托之间变化约50％。这种意外的功能实际上与最近的文献非常一致，后者显示了类似的趋势。但是，尝试通过RRKM计算来产生此结果是不成功的。弛豫时间与可获得的文献一致，并且孵育时间与弛豫时间的比率在4000-6600 K上介于1.5和3之间，与其他分子的发现一致。这些比率比Oehlschlaeger等人最近从反射冲击实验得出的比率要小得多。 （Z.Phys.Chem.2005，219，555）。一个简单的论点表明，如此大的值确实是异常的，尽管不清楚为什么太大。

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