Esben Auken

The free-induction decay (FID) is the most widely implemented surface nuclear magnetic resonance (NMR) experiment. One shortcoming of the FID is that there is often much uncertainty surrounding the meaning of the FID's time dependence - can the FID provide valuable insight into pore-size and permeability or has the signal been contaminated by background magnetic field inhomogeneity? To address this uncertainty, we investigate if an updated surface NMR forward modelling scheme, which involves solution of the full Bloch-equation, can provide the ability to better constrain the link between FIDs and pore-sizes. That is, can the link between the relaxation times T2* and T2 be constrained from FID data alone? A numerical analysis of whether an inversion based on the updated forward model can produce depth profiles of both T2* and T2 from only FID data is presented.