Experimental evidence for the time dependence of the metastable decay rate of Ne cluster ions: A further key to the magic number problem

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Abstract
Clusters of Ne atoms formed in a supersonic nozzle expansion have been studied by electron ionization mass spectrometry. In particular, we have found that the metastable decay of Ne cluster ions is very nonexponential, thus confirming a recent theoretical prediction of Klots applying quasiequilibrium theory to the problem of unimolecular fragmentation of clusters.