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Fig. 1
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Comments: Judging from the unnormalized spectra (figs 4-5) C +, CH + and C 2 + (possibly also slight H + (?)) are formed in excitation via the A state (i.e. A<-X resonance excitation) Judging from the normalized spectra (figs. 1-3) relatively more C 2 + (compared to C + and CH + ) is formed via A state excitation compared to nonresonant transition NB!: the A<-X spectrum is a weak signal (1+ n)REMPI, hence it is observed for strong LASER power only, in which case large nonresonant component can be expected.
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