四氢甲烷与氦、氖、氩和氙混合物的旋转弛豫

Physica Pub Date : 1974-12-15 DOI:10.1016/0031-8914(74)90374-7

P.G. Kistemaker, M.M. Hanna , A.E. de Vries

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引用次数: 16

摘要

在CD4与He, Ne, Ar和Xe的混合物中进行了吸声测量，以研究稀有气体对CD4旋转弛豫的影响。测量在100至150 torr的压力范围内进行，温度为308 K，频率为3 MHz。得到的弛豫时间和旋转碰撞数与在ch4 -惰性气体混合物中发现的趋势相同。碰撞数Zrot(定义为旋转弛豫时间与两次弹性碰撞之间的平均时间之比)随着惰性气体质量的增加而增加。结果显示:Zrot (CD4CD4) = 10.0±0.3,Zrot (CD4He) = 2.6±0.7,Zrot (CD4Ne) = 4.1±0.6,Zrot (CD4Ar) = 7.3±0.6,Zrot (CD4Xe) = 14±3。并将实验结果与粗球模型的理论预测结果进行了比较。

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Rotational relaxation in mixtures of tetradeuteromethane with helium, neon, argon and xenon

Sound-absorption measurements have been made in mixtures of CD₄ with He, Ne, Ar and Xe to investigate the effect of the noble gases on the rotational relaxation of CD₄. The measurements were carried out in the pressure range of 100 to 150 torr, at 308 K and a frequency of 3 MHz. The relaxation times and rotational collision numbers obtained show the same tendency as was found in CH₄—noble-gas mixtures. The collision numbers Z_rot, defined as the ratio of the rotational relaxation time and the mean time between two elastic collisions, increase with increasing mass of the noble gas. We found the following numbers: Z_rot (CD₄CD₄) = 10.0 ± 0.3, Z_rot (CD₄He) = 2.6±0.7, Z_rot (CD₄Ne) = 4.1±0.6, Z_rot (CD₄Ar) = 7.3±0.6, Z_rot (CD₄Xe) = 14±3.

A comparison between these experimental results and theoretical predictions by the rough-sphere model is given.

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Physica

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