{"term":{"id":"08313","title":"adiabatic pulse","longtitle":"IUPAC Gold Book - adiabatic pulse","doi":"10.1351\/goldbook.08313","code":"08313","status":"current","definitions":[{"id":1,"text":"Radiofrequency pulse that inverts spins by using a frequency sweep during the pulse.","notes":{"1":"Adiabatic pulse allows very high spectral bandwidth and accurate flip angles to be achieved with high tolerance to spatial variations in RF field intensity and is thus of value in excitation of nuclei with frequency ranges.","2":"The sweep must be slow enough to satisfy the adiabatic condition \\({\\rm{d}}\\theta\/{\\rm{d}}t \\ll \\gamma \\boldsymbol{B}_{\\rm{eff}}\\) where \\(\\boldsymbol{B}_{\\rm{eff}}\\) is the effective radiofrequency magnetic flux density and \\(\\theta\\) is the angle between \\(\\boldsymbol{B}_{\\rm{eff}}\\) and abscissa."},"links":[{"term":"RF","url":"https:\/\/goldbook.iupac.org\/terms\/view\/08279"},{"term":"spectral bandwidth","url":"https:\/\/goldbook.iupac.org\/terms\/view\/08286"}],"sources":["PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 681 (https:\/\/doi.org\/10.1515\/pac-2019-0203)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/08313\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/08313\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/08313\/plain"},"citation":"Citation: 'adiabatic pulse' 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.08313","license":"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.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","disclaimer":"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.","accessed":"2026-06-30T21:41:41+00:00"}}