Field ionisation kinetics: reproducibility in the determination of short lifetimes

An extremely simple but highly sensitive field ionisation (FI) source is described, together with modifications to be commercial MS-9 double focusing mass spectrometer, which allow the instrument to be used for field ionisation kinetics (FIK) measurements. It is established that the lifetimes and ra...

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Bibliographic Details
Published in:International journal of mass spectrometry and ion physics 1975-01, Vol.18 (4), p.393-405
Main Authors: Derrick, Peter J., Morgan, Roger P., Hill, John T., Baldwin, M.A.
Format: Article
Language:English
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Summary:An extremely simple but highly sensitive field ionisation (FI) source is described, together with modifications to be commercial MS-9 double focusing mass spectrometer, which allow the instrument to be used for field ionisation kinetics (FIK) measurements. It is established that the lifetimes and rate constants determined through these measurements are reproducible from laboratory to laboratory. It is suggested that the “conditioning” of the emitter of an FI source may alter the internal energy distribution P( E) of the molecular ions produced by FI. Following FI, collision-induced decompositions may make significant contributions to metastable peaks even at normal (10 μPa) analyser pressures.
ISSN:0020-7381
1873-3034
DOI:10.1016/0020-7381(75)87055-0