Cluster Impact Chemistry
Cluster Impact Chemistry
复制标题
集群影响化学
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
U. Even
中科院分区：
文献类型：
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作者：
W. Christen;U. Even
本文研究了动能为1−，100 eV/分子的分子团簇离子与固体表面的相互作用。我们报道了团簇撞击靶后能量获取的实验结果，团簇碎裂的大小分布和时间尺度，以及团簇碰撞引起的化学反应的第一个例子。特别是，我们发现对于p型金刚石薄膜和中等碰撞能量，团簇-表面碰撞的弹性令人惊讶地高： ，完整的团簇通常以其碰撞能量的75%反冲。然而，一旦星团获得了足够的内部能量，它们就会破碎，主要是单体。在质子化的氨团簇离子的情况下，团簇在表面撞击时的这种破碎速度被证明比80ps快。它提供的证据表明，团簇撞击技术允许在过热的团簇离子碎裂之前在其内部进行超快能量重新分配。这是可行的.
This paper addresses the interaction of molecular cluster ions with a solid surface in the kinetic energy range of 1−100 eV/molecule. We report experimental results on the energy acquisition by the cluster following its impact on the target, the size distribution and the time scale of cluster fragmentation, and first examples of chemical reactions induced by cluster impact. In particular we show that for a p-type diamond film and moderate collision energies the elasticity of the cluster-surface impact is surprisingly high: The intact cluster recoils with typically 75% of its collision energy. Once, however, the clusters have acquired sufficient internal energy they will shatter, mostly to monomers. In the case of protonated ammonia cluster ions this shattering of clusters upon surface impact is shown to be faster than 80 ps. It provides evidence that the technique of cluster impact allows an ultrafast energy redistribution within superheated cluster ions prior to their fragmentation. The feasibility of t...