pulsed-field gradient 

Synonym: gradient pulse
Initialism: PFG
https://doi.org/10.1351/goldbook.08397
Short, timed pulse in nuclear magnetic resonance spectroscopy that momentarily destroys the magnetic field homogeneity within the sample through a spatial-dependent field intensity.
Notes:
  1. The net result of the pulse is that spins are dispersed in the transverse plane (defocussed) and produce zero net magnetization.
  2. A PFG is characterized by its power, shape, duration and axis.
  3. PFG techniques are used in magnetic resonance imaging, spatially-selective NMR, and diffusion ordered NMR spectroscopy (DOSY).
Source:
PAC, 2021, 93, 647. (Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)) on page 701 [Terms] [Paper]
Citation: 'pulsed-field gradient' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.08397 RIS BibTex EndNote
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