Knowledge Bank

The rf spectra corresponding to the reorientations of the $N15$ nuclear moment and the molecular rotational moment have been studied in $N215$ by the molecular beam magnetic resonance method. A recently constructed beam apparatus with an electron bombardment detector was used for the experiments. In order to study these small moments, it was advantageous, to go to very narrow slits. The intensity of the beam was maintained at the normal level through the use of multiple bearns. Our experiments were carried out at magnetic fields of 7400 and 6700 gauss. From a preliminary analysis of the $N15$ nuclear resonance, the magnitude of the spin-rotational constant of $N15$ in $N215$ was determined to be $23\pm 3$ kcs. This can be shown to be consistent with available nitrogen chemical shift data. The magnitude of the rotational magnetic moment of $N215$ was found to be $0.2593\pm 0.0005$ nm.