Levitt, Malcolm H.Bodenhausen, GeoffreyErnst, Richard R.2006-02-222006-02-222006-02-22198310.1016/0022-2364(83)90216-0https://infoscience.epfl.ch/handle/20.500.14299/225483The action of heteronuclear decoupling applied to I spins while observing the resonance of a 2nd nuclear species S is examd. for systems prepd. in an arbitrary initial state. Unexpected effects may be produced; the removal of heteronuclear interactions by strong decoupling fields does not guarantee that the 2 spin systems behave independently. In particular, antiphase multiplet magnetization of the S spins remains directly responsive to the radio-frequency I spin perturbation, and to I-I interactions, even when the decoupling removes the heteronuclear coupling interactions completely. Some simple illustrative examples are examd. theor. and exptl. [on SciFinder (R)]text::journal::journal article::research article