Abstract
Bimolecular reaction of NO dimer with O atom was studied by use of a crossed beam apparatus. NO dimer was generated by the supersonic expansion of NO seeded in He. Oxygen atom beam, generated by the microwave discharge, was crossed with (NO)2 beam and the chemiluminescence from the product NO*2 was measured as a function of the scattering angle. The angular distribution is anisotropic and peaking at θlab=0, with respect to (NO)2 incidence. This fact suggests sideways or backward scattering of O atom in (NO)2+O reaction.