double resonance

https://doi.org/10.1351/goldbook.08333

Nuclear magnetic resonance spectroscopy experiment where excitation is applied independently to two distinct frequency ranges.

Note:
Double resonance is most commonly applied for spin decoupling.

Source:
PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 686 (https://doi.org/10.1515/pac-2019-0203)