Fe（O2）n ~+（n=1-6）团簇碰撞诱导解离的交叉分子束新技术研究
Collision-Induced Dissociation Studies on Fe(O2)n+ (n=1-6) Clusters: Application of a New Technique Based on Crossed Molecular Beams
摘要：
在分子束装置中制备了气相富氧氧化铁团簇Fe（O_2）_n ~+（n=1-6）。通过测量碰撞诱导解离实验的碎裂截面研究了它们的稳定性和结构。为此，采用了两种不同的技术。第一个依赖于测量的碎片后碰撞激活和随后的解离的质量选择的集群离子在分子束通过充满惰性气体原子的细胞通过。第二个是一种新的方法，我们介绍和交叉分子束的基础上测量的碎片截面，在一个更有效的方式没有质量选择的个别集群。用不同的技术得到的截面相互比较，以及从一个简单的几何投影模型的应用程序产生的理论。最后，所观察到的一般趋势进行了比较与其他铁分子簇的结果在文献中。
英文摘要：
Gas-phase oxygen-rich iron oxide clusters Fe(O2)n+ (n=1-6), are produced in a molecular beam apparatus. Their stability and structure are investigated by measuring the fragmentation cross sections from collision-induced-dissociation experiments. For this purpose, two different techniques have been employed. The first one relies on the measurement of the fragments resulting after collisional activation and subsequent dissociation of mass selected cluster ions in a molecular beam passing through a cell filled with noble gas atoms. The second one is a new approach that we introduce and is based on crossed molecular beams to measure the fragmentation cross sections, in a more efficient manner without mass selection of the individual clusters. The cross sections obtained with the different techniques are compared with each other as well as with theoretical ones resulting from the application of a simple geometrical projection model. Finally, the general trends observed are compared with results for other Fe-molecule clusters available in the literature.
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