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Eur. J. Mass Spectrom. 6, 325 - 330 (2000)

Sequential dissociation kinetics and fragment distribution of cluster ions

Rong-Bin Huang, Hong Chen, Qiang Zhang and Lan-Sun Zheng*
The State Key Laboratory for Physical Chemistry of Solid Surface, Department of Chemistry, Xiamen University, Xiamen 361005, China

ABSTRACT:
A sequential fragmentation mechanism for production of cluster ions is explored. Based on the mechanism, the kinetic equations were built and analytically solved with and without the constant rate coefficient assumption. Furthermore, the probability of deactivation of the cluster ions was considered, and the kinetic equation with this consideration was also analytically solved. The solutions are able to account for the features of recorded size distribution and magic numbers of C+60 and other cluster ions. The range of time window observing the evaluative yield populations of sequential loss mechanism can also be estimated.

Keywords: sequential dissociation, kinetics, cluster ions, fragment distribution

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