Time-of-Flight Measurements of Cesium-Iodide Cluster Ions
Werner EnsPhysics Department, University of Manitoba, Winnipeg R3T 2N2, CanadaRonald C. BeavisPhysics Department, University of Manitoba, Winnipeg R3T 2N2, CanadaKenneth G. StandingPhysics Department, University of Manitoba, Winnipeg R3T 2N2, Canada
1983en
ABI
Abstract
Secondary ions ${[{(\mathrm{CsI})}_{n}\mathrm{Cs}]}^{+}$, with $n$ up to \ensuremath{\sim} 40, were produced by 8-keV ${\mathrm{Cs}}^{+}$ bombardment of CsI. The yield of clusters decreased smoothly with $n$ when observed in a time-of-flight mass spectrometer at effective times \ensuremath{\sim} 0.2 \ensuremath{\mu}s after emission. Clusters with $n>7$ were found to be metastable, with lifetimes \ensuremath{\ll} 100 \ensuremath{\mu}s. A large anomaly in the population of the disintegration products was measured at \ensuremath{\sim} 70 \ensuremath{\mu}s after emission, $n=13$ clusters being favored and $n=14 \mathrm{and} 15$ suppressed.
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