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Real time monitoring of the evaporative cooling: Application to the dynamics of Nal-(NH_3)_n clusters

机译:蒸发冷却的实时监控:在Nal-(NH_3)_n团簇动力学中的应用

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摘要

The picosecond evaporation dynamics of ammonia molecules from Na(NH_3)_n clusters produced via the dissociation of NaI within an ammonia cluster is studied experimentally. A time dependence of the mass selected ion signal is observed only for one cluster size and not for larger clusters nor for smaller ones. It will be shown that evaporation in the ionic state is responsible for the absence of an observation of the evaporation in the neutral state. The variation of the ionization cross section with cluster size is the key point for the interpretation of the results.
机译:实验研究了通过NaI在团簇内解离产生的Na(NH_3)_n团簇中氨分子的皮秒蒸发动力学。质量选择离子信号的时间依赖性仅在一个簇尺寸上观察到,而对于较大的簇或较小的簇则没有观察到。可以看出,在离子状态下的蒸发是导致没有观察到中性状态下的蒸发的原因。电离截面随簇尺寸的变化是解释结果的关键。

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