|Title||$\beta$-detected nuclear quadrupole resonance and relaxation of $^8$Li$^+$ in sapphire|
|Publication Type||Journal Article|
|Year of Publication||2014|
|Authors||Salman, Z, Chow, KH, Hossain, MD, Kiefl, RF, Levy, CDP, Parolin, TJ, Pearson, MR, Saadaoui, H, Wang, D, MacFarlane, WA|
|Journal||J. Phys.: Conf. Ser.|
We report detailed behaviour of low energy 8 Li implanted near the surface of α- Al 2 O 3 single crystal, as revealed by beta-detected NQR of 8 Li. We find that the implanted 8 Li occupies at least two sites with non-cubic symmetry in the Al 2 O 3 lattice. In both sites the 8 Li experiences axially symmetric electric field gradient, with the main principal axis along the c -crystallographic direction. The temperature and field dependence of the spin lattice relaxation of 8 Li in α-Al 2 O 3 , indicate that the 8 Li diffusion is negligible on the scale of its lifetime, 1.21 s.