MAGNETIC MOMENT OF N$sup 1$$sup 3$

The spin and magnetic moment of 10-minute N/sup 13/ was measured by the atomic beam magnetic resonance method. A continuous flow source was used. N/sup 14/ was bombarded in melamine powder by 18-Mev protons and the resulting N/sup 13/ was flushed with neon. It was then neutralized and passed through a machine consisting of a series of magnets. Finally, the atoms were collected on titanium foils and the positron activity was counted. N/sup 13/ atoms were produced mainly in the /sup 4/S/sub 3/2/ state, nuclear spin was 1/2, and the hyperfine structure separation, DELTA nu , was 33.2 plus or minus 0.3 Mc/sec. Data on the magnetic moments of pairs of mirror nuclei are tabulated, and it is shown that the mesonic current contributions in N/sup 13/ and C/sup 13/, if they exist, obey the mirror principle. (L.N.N.)