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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Dynamics of Excited Sodium Atoms Attached to Helium Nanodroplets
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Dynamics of Excited Sodium Atoms Attached to Helium Nanodroplets

机译：兴奋的钠原子附着到氦纳米液滴的动力学。

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摘要

The dynamics of laser-excited sodium atoms at the surface of helium nanodroplets has been investigated as a function of quantum state. For all cases, excitation of the system leads to desorption of the sodium atom from the droplet surface. The mean kinetic energy of the desorbed atoms scales linearly with excitation frequency, indicative of an impulsive desorption process. The energy partitioning between the helium and the desorbing sodium atom depends on the quantum state and appears to be related to the size and shape of the electron orbital. The speed distributions of desorbed NaHe exciplexes point toward a direct formation process of an exciplex with no internal energy. Photoelectron spectroscopy reveals an increasing importance of helium-induced relaxation with increasing quantum state, which is tentatively attributed to curve crossing between different NaHe_N interaction potentials during the desorption process.
机译：已经研究了氦纳米液滴表面的激光激发钠原子的动力学与量子态的关系。在所有情况下，系统的激发都会导致钠原子从液滴表面解吸。解吸原子的平均动能与激发频率成线性比例，表明脉冲解吸过程。氦和解吸钠原子之间的能量分配取决于量子态，并且似乎与电子轨道的大小和形状有关。解吸的NaHe激基复合物的速度分布指向没有内部能量的激基复合物的直接形成过程。光电子能谱揭示了氦诱导的弛豫随量子态增加的重要性，这暂时归因于解吸过程中不同NaHe_N相互作用势之间的曲线交叉。

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