Computer simulations of multiple-quantum NMR experiments. II. Selective excitation
The effects of selective multiple-quantum pulse sequences have previously been analyzed by coherent averaging theory. However, convergence of the Magnus expansion used for those calculations is questionable in the experimentally important region of long cycle times. Exact density matrix evolutions are calculated here to show when the coherent averaging calculations will be reliable. In addition, simple selective sequences which cannot be treated by coherent averaging theory are also analyzed. © 1984.