Fig.3.

(a) Fitting example of the simulated decay S(T_mp) (red circles). The parameters used for simulations are: $T_{1\rho }^f=10\text{ms}(50\%\text{population})$and $T_{1\rho }^s=150\text{ms}(50\%\text{population})$. T₁ was assumed to be the same for both fast and slow relaxing components, T₁ = 1000 ms. The red solid line shows the fitting using just the first two data points ( $T_{1\rho }^a$) to provide an estimation approaching $T_{1\rho }^{\mathit{\text{ave}}}$. The grey dash-dot line shows the resulting $T_{1\rho }^s$ and C_s obtained from the intermediate fitting (black dash line) (see Appendix B for details). (b) Examples of the asymptotic $T_{1\rho }^a$ approaching $T_{1\rho }^{\mathit{\text{ave}}}$ at different conditions. The empty circles are the values of $T_{1\rho }^{\mathit{\text{ave}}}$.