Magnetic Moment of The1−ground State Inn18

The ${}^{18}\mathrm{N}$ ground state magnetic moment $|\ensuremath{\mu}|\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.135(15){\ensuremath{\mu}}_{N}$ has been measured using a modified $\ensuremath{\beta}$ 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 $\ensuremath{\beta}$ asymmetries. The method opens a new range of applications to study static dipole and quadrupole moments of exotic nuclei near the drip lines.