Double resonance nuclear magnetic resonance spectra of partially aligned molecules

Abstract

The theory of Anderson and Freeman for double resonance has been extended to the case of partially aligned systems. A computer programme has been written to calculate such spectra and the results are given for a number of spin systems. Some examples are given showing decoupling of interactions between hydrogen and deuterium by coherent double resonance. The theory of phase modulated double resonance is presented and it is shown experimentally to give improved decoupling.