Magnetic Moment of the1−Ground State inN18Measured with a NewβLevel Mixing Nuclear Magnetic Resonance Technique

The ${}^{18}\mathrm{N}$ ground state magnetic moment $|\mu |=0.135\mathrm{}\left(15\right){\mu }_N$ has been measured using a modified $\beta$ nuclear magnetic resonance technique. The value is compared to shell-model calculations. Spin-aligned ${}^{18}\mathrm{N}$ projectile fragments were produced in the fragmentation of ${}^{22}\mathrm{Ne}$ at 60.3 MeV/nucleon. Polarization of the nuclear spins was resonantly induced by a combined magnetic dipole, electric quadrupole, and radio frequency interaction. This is the first application of a new method that allows production of polarized nuclei from spin-aligned projectile fragments, allowing one to measure $\beta$ asymmetries. The method opens a new range of applications to study static dipole and quadrupole moments of exotic nuclei near the drip lines.