Relaxation rates from time-of-flight analysis of molecular beams
Relaxation rates from time-of-flight analysis of molecular beams
复制标题
分子束飞行时间分析的弛豫率
DOI：
10.1063/1.1681564
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发表时间：
1974
影响因子：
4.4
通讯作者：
J. Fenn
中科院分区：
文献类型：
--
作者：
R. J. Gallagher;J. Fenn
当气体从处于停滞温度 T0 和压力 P0 的储层膨胀到真空室中时产生的自由射流中，在内能到膨胀的定向动能的转换中可能会出现显着的滞后。提出了一种分析技术，用于根据在距声喉固定距离处的自由射流轴上测量的速度分布来确定旋转能量弛豫率。与其他方法获得的速率的一致性很好。给出了二氧化碳、氧气、氢气和甲烷的一些示例实验和分析结果。
In the free jet generated when a gas is expanded from a reservoir at stagnation temperature T0 and pressure P0 into a vacuum chamber, substantial lags can occur in the conversion of internal energy into directed kinetic energy of the expansion. An analytical technique is presented for determining rotational energy relaxation rates from velocity distributions measured on the axis of the free jet at a fixed distance from the sonic throat. The agreement with rates obtained by other methods is good. Some sample experimental and analytical results for carbon dioxide, oxygen, hydrogen, and methane are presented.