Transient field at nitrogen nuclei recoiling in iron and the magnetic moment of theN15first excited state

Precession measurements have been performed on nuclear-excited nitrogen ions recoiling in magnetized iron employing the implantation perturbed-angular-correlation technique. The transient magnetic field, calibrated with the ${}_{}{}^{16}{}_{}{}^{}\mathrm{N}$($1^{-}$) state, was found to be enhanced by a factor of 2.1(5) over the empirically adjusted Lindhard-Winther prediction. A negative sign was determined for this $g$ factor and a value of $g=+0.9\mathrm{}\left(3\right)\mathrm{}$ for that of the ${}_{}{}^{15}{}_{}{}^{}\mathrm{N}\left({\frac{5}{2}}^{+}\right)$ state.