External magnetic field effects on the β band emission of NO

Magnetic field effects on the β band chemiluminescence of NO were studied for three cases in which the excited state (B 2Π) was produced through different reaction processes. The chemiluminescence from the v’=0 level was quenched for the three cases by a magnetic field. The magnetic field effect upon that from the v’=2 level was dependent on the reaction processes. No effect was observed for that from the v’=4 level. These findings can be explained in terms of the magnetically induced interaction between the B 2Π state and the a 4Π or b 4Σ state.