The Application of Multi‐Photon Ionization Mass Spectrometry to the Study of the Reactions O + C2H4, F + C3H6, F + c‐C3H6, F + CH3OH, H + CH2OH and O + CH3O

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Abstract
The experimental arrangement of a time‐of‐flight mass spectrometer with multi‐photon ionization and electron impact ionization is described. This set up was combined with a discharge flow reactor and a molecular beam sampling device. The detection of the radicals CH3, C3H5, CH2OH and their deuterated analogs by the wave‐length selective multi‐photon ionization allowed the identification of primary products of elementary reactions in the gas‐phase (around 1 mbar). The branching ratios for the reactions were determined as (0.5 ± 0.15), (0.5 ± 0.1), (0.95 ± 0.05), respectively. – For the reactions of the CH2OH and CH3O radicals with H and O atoms, the following reaction paths were established: