4 results about "Free induction decay" patented technology

In Fourier transform nuclear magnetic resonance spectroscopy, free induction decay (FID) is the observable NMR signal generated by non-equilibrium nuclear spin magnetization precessing about the magnetic field (conventionally along z). This non-equilibrium magnetization can be induced, generally by applying a pulse of resonant radio-frequency close to the Larmor frequency of the nuclear spins.