Inversion pulse

{
  "id": "MLC-T-CHM-006060",
  "term": "Inversion pulse",
  "field": "Chemistry",
  "definition": "A radiofrequency pulse in nuclear magnetic resonance (NMR) spectroscopy that rotates the bulk magnetization vector by 180 degrees around an axis in the transverse plane. This pulse inverts the populations of the spin states, moving magnetization from the +z axis to the -z axis. Inversion pulses are used in pulse sequences such as inversion recovery to measure spin-lattice (T1) relaxation times and in spin echo sequences to refocus chemical shifts.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "180° pulse",
    "nuclear magnetic resonance spectroscopy"
  ],
  "references": [
    "PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 694 (https://doi.org/10.1515/pac-2019-0203)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/inversion-pulse/"
}