Magnetic Moments due to Rotation inLi6F andLi7F

A molecular beam electric resonance spectrometer has been used to measure the Zeeman splitting of the hyperfine structure of ${\mathrm{Li}}^6$F and ${\mathrm{Li}}^7$F in the $J=1\mathrm{}$ rotational state. From these measurements the magnitudes of the rotational magnetic moments of these molecules were determined: ${\left(\frac{{\mu }_J}{J}\right)}_{{\mathrm{Li}}^6\mathrm{F}}=\left({{0.0818}_{-0.0003\mathrm{}}}^{+0.0005\mathrm{}}\right) \mathrm{nuclear}\mathrm{magnetons}\mathrm{per} J.\mathrm{}$ ${\left(\frac{{\mu }_J}{J}\right)}_{{\mathrm{Li}}^7\mathrm{F}}=\left({{0.0642}_{-0.0002\mathrm{}}}^{+0.0004\mathrm{}}\right) \mathrm{nuclear}\mathrm{magnetons}\mathrm{per} J.\mathrm{}$ Since the signs of the rotational magnetic moments could not be measured, the sign of the electric dipole moment was not determined experimentally.