Collision induced dissociation of doubly charged stored metal cluster ions
✍ Scribed by L. Schweikhard; G. Dietrich; S. Krückeberg; K. Lützenkirchen; C. Walther; J. Ziegler
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 89 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0951-4198
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✦ Synopsis
Singly charged noble metal cluster ions from an external laser vaporization source are accumulated in a Penning trap. They are subjected to electron bombardment for further ionization. The doubly charged clusters are size selected and their low energy fragmentation pathways are studied by multiple-collision-induced dissociation. The reaction products are analysed by time-of-flight detection. In general, large clusters tend to evaporate neutral atoms while small clusters fission into two singly charged fragments, one of which is a trimer. The details, however, vary and depend on the specific elements and cluster sizes as exemplified by the fragmentation of doubly charged copper, silver, gold and platinum clusters of size around n = 16.