EXTERNAL MAGNETIC-FIELD EFFECTS ON CHEMILUMINESCENCE INTENSITIES FROM C-2(D) AND CN(B) STATES IN LOW-PRESSURE C2H2/N, O FLAMES

Magnetic field effects on chemiluminescence intensities from some reaction intermediates in low pressure C2H2/N, O flames were measured. 0 atoms were produced without O2 by adding NO into a discharged N2 stream. Diffusion flames were formed between electromagnet poles when a C2H2 stream from another inlet encountered an N2 stream containing 0 and/or N atoms. Both partial titration by and excess addition of NO enhanced the magnetic field quenching of the chemiluminescence due to the C2 Swan system. The CN violet system showed magnetic field quenching only when the excess NO was present. Possible mechanisms for these magnetic field effects are discussed briefly.