Spin-spin relaxation time

{
  "id": "MLC-T-CHM-011226",
  "term": "Spin-spin relaxation time",
  "field": "Chemistry",
  "definition": "The time constant T2 for the decay of transverse magnetization in nuclear magnetic resonance, caused by fluctuating local fields from neighbouring spins that make the spins lose phase coherence. Static field inhomogeneity adds a further apparent decay described by T2-star, which a spin echo refocuses. T2 is less than or equal to the spin-lattice relaxation time T1, and the two are equal for small molecules in fluid solution.",
  "synonyms": [
    "transverse relaxation time"
  ],
  "subject": "Analytical Chemistry",
  "see_also": [
    "net dephasing time",
    "spin-lattice relaxation time",
    "spin-spin relaxation"
  ],
  "references": [
    "PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 707 (https://doi.org/10.1515/pac-2019-0203)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/spin-spin-relaxation-time/"
}