X-band ESR spectrum of nitrogen dioxide

The ESR spectrum of gaseous NO2 has been studied experimentally over the pressure range 0.05–10 torr at X band for a range of polarizing magnetic field 1.5–8 kG. The spectra are interpreted by a theory which includes the effects of anisotropic electronic and molecular magnetism, intermediate coupling of angular momenta, and centrifugal distortion. Well isolated spectral lines at high magnetic field have been employed to give quantitative information on the electronic g tensor.