甲烷团簇与氘团簇的团簇源特性比较
Characteristics comparison of deuterium clusters and methane clusters
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摘要: 利用瑞利散射法测量了特定喷嘴产生的甲烷团簇及氘团簇的大小随背压的变化曲线。将团簇大小的实验值与Hagena理论进行了比较，当背压超过3 MPa时，两种团簇的实验值都明显高于理论值。实验发现，特定喷嘴在相同的背压下，常温(298 K)甲烷团簇尺寸小于低温(80 K)氘团簇尺寸，而甲烷团簇中氢原子数至少是氘团簇中氘原子数的1.98倍。Abstract: For deuterium clusters and methane clusters produced by specific jet nozzle, Rayleigh scattering has been employed to investigate the cluster formation process and to measure the cluster size at different gas back pressure. The comparison between Hegena’s theory and our experiment shows that, experimental sizes of deuterium and methane clusters are larger than their respective theoretical ones; the methane clusters derived at 298 K is smaller than the deuterium clusters derived at 80 K, but hydrogen atoms in methane clusters are at least 1.98 times the number of deuterium atoms in deuterium clusters under the same back pressure.
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Key words:
- deuterium cluster /
- methane cluster /
- rayleigh scattering /
- cluster size
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