دورية أكاديمية
Shock-tube study of relaxation in HCN.
العنوان: | Shock-tube study of relaxation in HCN. |
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المؤلفون: | Srinivasan, N. K., Gupte, K. S., Kiefer, J. H. |
المصدر: | Journal of Chemical Physics; 8/21/2008, Vol. 129 Issue 7, p074903, 6p, 4 Graphs |
مصطلحات موضوعية: | SHOCK tubes, RELAXATION phenomena, KRYPTON, THERMODYNAMICS, ENERGY transfer |
مستخلص: | Thermal vibrational relaxation in HCN mixtures with Kr has been observed with the laser-schlieren technique. The experiments cover the temperatures 750–2900 K and a large pressure range of 13–420 Torr in 5% and 20% HCN/Kr mixtures. Relaxation is extremely fast but appears to occur in two well-separated stages that are assigned to the vibrational transitions (000)→(010) and (000)→(100) with perhaps some lesser contribution from (000)→(001). This interpretation is strongly supported by a comparison of net density changes to thermodynamic calculations. The first and faster process shows near constant relaxation times whereas the latter slower stage has a slight decrease of these with T. Relaxation times in pure HCN obtained by neglecting the small contribution of krypton are as follows: (a) Pτ |
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قاعدة البيانات: | Complementary Index |
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