Figure 4.

Electric sector field scan transmitting the Cr(CO)₆⁺ precursor ion at the electric field E₀ without collision gas (red curve) and with collision gas (black) in the collision cell. The fragment ions formed in the collision cell were subsequently accelerated with 600 V. Without collision gas only the metastable decay of the parent cation into Cr(CO)₅⁺, in the FF2 was detected; in the collision-induced dissociation spectrum several more peaks appear (see text). The metastable peak is still present in this case. The initial electron energy was ca. 70 eV.