08397 IUPAC Gold Book - pulsed-field gradient 10.1351/goldbook.08397 08397 current initialism: PFG synonym: gradient pulse 1 Short, timed pulse in nuclear magnetic resonance spectroscopy that momentarily destroys the magnetic field homogeneity within the sample through a spatial-dependent field intensity. The net result of the pulse is that spins are dispersed in the transverse plane (defocussed) and produce zero net magnetization. A PFG is characterized by its power, shape, duration and axis. PFG techniques are used in magnetic resonance imaging, spatially-selective NMR, and diffusion ordered NMR spectroscopy (DOSY). diffusion ordered NMR spectroscopy https://goldbook.iupac.org//terms/view/08329 nuclear magnetic resonance spectroscopy https://goldbook.iupac.org//terms/view/08218 PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 701 (https://doi.org/10.1515/pac-2019-0203) https://goldbook.iupac.org/terms/view/08397/html https://goldbook.iupac.org/terms/view/08397/json https://goldbook.iupac.org/terms/view/08397/plain 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. 10.1351/goldbook.08397 The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. 2026-05-30T13:14:59+00:00