Abstract
The arrival times and apparent masses of daughter ions formed along the ion path of an electrostatic mirror time-of-flight mass spectrometer were calculated. A distinct metastable peak results from fragmentation in the first field-free region. Peak shapes were calculated, accounting for released energy, daughter-to-parent ion mass ratio, ion packet length, and mass spectrometer geometry. Numerical examples illustrate the effect of these parameters on the peak appearance. Simplified peak shape expressions result when no point in the field-free space enjoys energy focusing in time for the daughter ion peak considered.
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