By producing a train of absorption or dispersion signals (continuous‐wave magnetic resonance) or free induction decays (pulsed magnetic resonance) it is possible to save time in spin‐lattice relaxation measurements due to the fact that it is not necessary to wait for equilibrium magnetization before initiating the train. The relaxation time may be calculated from the train according to a simple rapidly converging iteration.
Look, D. C.,
& Locker, D. R.
(1970). Time Saving in Measurement of NMR and EPR Relaxation Times. Review of Scientific Instruments, 41 (2), 250-251.