Faraday communications. Nuclear spin relaxation of 7Li in aqueous solutions of LiCl

Abstract

Spin–lattice relaxation times, T₁, of ⁷Li NMR have been measured for 12.3 mol kg^–1 LiCl–D₂O and 13.8 mol kg^–1 LiCl–H₂O samples at temperatures of 80 K to 313 K. The temperature dependence of T₁ for both samples was very similar over the whole temperature range. The minimum of T₁ was found to be 27 ± 1 ms for both samples. From the experimental results, it is concluded that the quadrupole interaction is responsible for the relaxation of ⁷Li NMR.