Abstract

Time-resolved metastable fractions (MFs) for C n + ( n = 48−62) were measured on an ion trap/reflectron mass spectrometer for trapping times up to 100 μs. The plot of the MFs versus ln( t 2 t 1 ) (where t 1 and t 2 are the times corresponding to the beginning and end of a metastable time window, respectively) is non-linear and approaches MF = 0 asymptotically as ln( t 2 t 1 ) approaches zero. We demonstrate that this experimental result can be modeled only by taking radiative decay, in addition to dissociative C 2-evaporative decay, into account.

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