spin-spin relaxation 

Synonyms: T2 relaxation, transverse relaxation
https://doi.org/10.1351/goldbook.08425
Loss of magnetization in the xy plane (in the absence of B0 inhomogeneities) through the interchange of energy between nuclear spins resulting in some precessing faster than the Larmor angular frequency and some slower.
Note:
The resultant exponential decay of signal is characterized by the spin-spin relaxation time T2 (reciprocal of the rate constant of this mechanism).
See also: net dephasing time
Source:
PAC, 2021, 93, 647. (Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)) on page 707 [Terms] [Paper]
Citation: 'spin-spin relaxation' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.08425 RIS BibTex EndNote
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