Abstract
The nuclear magnetic moment of {sup 9}Li and the quadrupole moments of {sup 8}Li and {sup 9}Li have been measured by use of the {beta}-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, LiNbO{sub 3}, and LiTaO{sub 3} crystals for quadrupole moment measurements. The electric-field gradient V{sub zz}=4.26(4)x10{sup 15} V/cm{sup 2} is deduced for Li in Zn. Using a recently adopted reference value, Q({sup 7}Li)=-40.0(3) mb, we reevaluated all earlier reported nuclear quadrupole moments of {sup 8}Li and {sup 9}Li. Based on all available previous and present data, the adopted quadrupole moments for these isotopes are Q({sup 8}Li)=+31.4(2) mb and Q({sup 9}Li)=-30.6(2) mb. The magnetic moment of {sup 9}Li is deduced as {mu}({sup 9}Li)=3.43678(6){mu}{sub N}. The values are compared with predictions from shell-model and cluster-model calculations.
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