Abstract

A new technique, which uses an ion cyclotron resonance mass spectrometer as an ion trap, is used to measure the autoionization rate of SF − 6. In the present experiments, the SF − 6 ion current is followed from 5 μsec to 800 μsec. The results show that SF − 6 does not decay by a simple, exponential, unimolecular process. Attempts to analyze the data in terms of unimolecular decay of a single state leads to ‘lifetimes’ which increase from < 0.3 msec to ca. 2 msec as the time delay between ion generation and analysis increases.

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