The nuclear magnetic moment of ${}^9\mathrm{Li}$ and the quadrupole moments of ${}^8\mathrm{Li}$ and ${}^9\mathrm{Li}$ have been measured by use of the β-asymmetry detection of nuclear magnetic resonance on optically polarized beams at ISOLDE/CERN. The radioactive beams were implanted in Si for g-factor measurements and in Zn, ${\text{LiNbO}}_3$, and ${\text{LiTaO}}_3$ crystals for quadrupole moment measurements. The electric-field gradient $V_{\mathit{zz}}=4.26(4)\times {10}^{15}$ V/${\text{cm}}^2$ is deduced for Li in Zn. Using a recently adopted reference value, $Q($${}^7\mathrm{Li}$$)=-40.0(3)$ mb, we reevaluated all earlier reported nuclear quadrupole moments of ${}^8\mathrm{Li}$ and ${}^9\mathrm{Li}$. Based on all available previous and present data, the adopted quadrupole moments for these isotopes are $Q($${}^8\mathrm{Li}$$)=+31.4(2)$ mb and $Q($${}^9\mathrm{Li}$$)=-30.6(2)$ mb. The magnetic moment of ${}^9\mathrm{Li}$ is deduced as $\mu ($${}^9\mathrm{Li}$$)=3.43678(6){\mu }_N$. The values are compared with predictions from shell-model and cluster-model calculations.

• Received 30 June 2005
• Publisher error corrected 3 November 2005

DOI:https://doi.org/10.1103/PhysRevC.72.044309