Crossed molecular beams kinetics: BaO recoil velocity spectra from Ba+N2O

Laboratory (LAB) angular and time‐of‐flight (TOF) recoil velocity spectra of BaO product produced by crossing a thermal Ba beam with a CO2 (for several collision energies) or O2 nozzle beam have been measured in a molecular beam apparatus equipped with an electron bombardment ionizer–quadrupole mass filter detector. Product center‐of‐mass recoil angle and energy distributions have been fit to the data by convoluting the c.m.→LAB transformation over measured speed distributions of both beams and the bandpass of the TOF analyzer. Both reactions produce symmetric product c.m. angular distributions which are indicative of the formation of long‐lived collision intermediates.

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