Medical Dictionary
Main Entry:
free induction decay Function:
noun : a time-based electrical signal that is detected in a nuclear magnetic resonance spectrometer, that is produced byinduction from the precessing magnetic moments of nuclei which have undergone a coherent quantum-mechanical spin transition caused by the application of a radiofrequency pulse, that decays with time,that can be converted to a more conventional frequency-based signal using analysis by Fourier transforms, and that with a suitable display can be used to extract more information from a test sample orsubject than is possible in conventional nuclear magnetic resonance spectroscopy —abbreviation
FID
