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Dissociation data for protonated leucine enkephalin fit to unimolecular kinetics. (a) Blackbody infrared radiative dissociation kinetics obtained with a cell temperature of 203 °C (○) and SORI–CAD kinetics with an excitation 1200 Hz below the ions cyclotron frequency (2.6 Vpp) (•); (b) SORI–CAD kinetics collected at different excitation voltages (ΔΩ = 1200 Hz, cell pressure = 2.6 × 10−6 Torr).
