cross polarization

https://doi.org/10.1351/goldbook.08327

Technique in solid-state nuclear magnetic resonance spectroscopy that enables polarization from abundant spins such as A1A221H or A19A2219F to be transferred to dilute spins such as A13A2213C or A15A2215N to enhance signal-to-noise ratio.

Note: Cross polarization requires that nuclei are dipolar coupled to one another.
Source:
PAC, 2021, 93, 647. (Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)) on page 685 [Terms] [Paper]