Figure 5

⁷Li experimental results obtained on a lithium metal strip. (a) Raw magnitude and phase data obtained by varying k (by changing τ) in the pulse sequence in Fig. 2 with N = 16, Δ = 800 μs and τ(π-pulse) = 16 μs for k = 1, as calibrated on 1 M LiCl(aq). The intensity of the on-resonance position in the spectrum is plotted. The simulated data are taken from the sum over all depths in Fig. 3. (b) Reconstructed S(r) slice profile from the results shown in (a). Error bars are derived from the errors in the pulse calibration (0.25 μs error assumed on the calibrated π/2 pulse) and NMR signal intensities (taken as the standard deviation of the noise in each spectrum). Where errors are not visible they fall within the marker size. The asterisks indicate a jump due to the additional overtone signal at k = 3 and \(r=\delta \,\mathrm{ln}\,3\approx 12\,\mu {\rm{m}}\).