碱金属纳米团簇的慢电子蒸发附着
Evaporative attachment of slow electrons to alkali nanoclusters
摘要：
低能电子附着在自由纳米团簇上形成的Na^-{n~7-140}阴离子的丰度谱相对于中性前体束被强烈而非平凡地重构。这种重组的定量详细解释蒸发附着的一般框架：电子被捕获的远程极化电位，其能量被转移到热振动，蒸发冷却和消散。数据还肯定了阳离子，中性和阴离子簇的结合能之间的关系，并调整二聚体蒸发能量的先验值。
英文摘要：
The abundance spectrum of Na^-_{n~7-140} anions formed by low energy electron attachment to free nanoclusters is measured to be strongly and nontrivially restructured with respect to the neutral precursor beam. This restructuring is explained in quantitative detail by a general framework of evaporative attachment: an electron is captured by the long-range polarization potential, its energy is transferred into thermal vibrations, and dissipated by evaporative cooling. The data also affirm a formulated relation between the binding energies of cationic, neutral, and anionic clusters, and an adjustment to the prior values of dimer evaporation energies.
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