|Title||High precision measurement of the 11 Li and 9 Li quadrupole moment ratio using zero-field β -NQR|
|Publication Type||Journal Article|
|Year of Publication||2014|
|Authors||Voss, A, Pearson, MR, Buchinger, F, Crawford, JE, Kiefl, RF, Levy, CDP, MacFarlane, WA, Mané, E, Morris, GD, Shelbaya, OTJ, Song, Q, Wang, D|
|Journal||J. Phys. G|
The ratio of electric quadrupole moments of 11 Li and 9 Li was measured using the zero-field β-detected nuclear quadrupole resonance technique at Triumf-Isac. The precision on the ratio Q 11 / Q 9 = 1.0775(12) was improved by more than one order of magnitude and an absolute value for the quadrupole moment of 11 Li was inferred. Systematic effects, as argued here, are not expected to contribute to the ratio on this scale. The zero-field spin-lattice relaxation time for 8 Li implanted within SrTiO 3 at 295 K in zero-field was found to be T 1 = 1.73(2) s. A comparison of the quadrupole moments of 9, 11 Li and their ratio is made with the latest models, however, no conclusion may yet be drawn owing to the size of the theoretical uncertainties.