Fig. 4 | Communications Physics

Fig. 4

From: Hybrid-state free precession in nuclear magnetic resonance

Fig. 4

Experimental accuracy and precision analysis of relaxation times measurements in different spin ensemble states. The T1 relaxation times in a and the T2 relaxation time in b result from the same fit of a single data set. As an example of a small sphere filled with doped water, we demonstrate experimentally the benefits of the hybrid state. The mean values of the hybrid-state experiments stay well within the 5% error margin (gray areas), while the transient-state experiment reveals an increasing bias with an increasing full-width at half maximum (FWHM). Note that the shape of the Larmor-frequency distribution present in this data lacks an analytical description, making a quantitative comparison to simulations difficult. The steady state has a systematic bias, which most likely stems from the \(T_2^ \ast\)-decay in the spoiled gradient-echo segment. The reference, shown at left, is composed of (inversion recovery) spin-echo experiments as the mean value and the Cramér–Rao bound as error bars

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