Inversion recovery sequence

{
  "id": "MLC-T-CHM-006061",
  "term": "Inversion recovery sequence",
  "field": "Chemistry",
  "definition": "A nuclear magnetic resonance (NMR) pulse sequence that begins with a 180-degree inversion pulse, followed by a variable delay time, and then a 90-degree excitation pulse. This sequence is primarily used to measure the spin-lattice (T1) relaxation time of nuclear spins. The signal intensity observed after the 90-degree pulse depends on the extent of T1 relaxation during the delay, with the signal passing through a null point at a specific inversion time.",
  "synonyms": [
    "inversion recovery"
  ],
  "subject": "Analytical Chemistry",
  "see_also": [
    "spin echo",
    "180° pulse",
    "inversion time",
    "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-recovery-sequence/"
}