Dipolar decoupling of protons with radiofrequency field amplitudes comparab
le to those used for the rare-spin refocusing and dephasing pi pulses resul
ts in accurate, high-sensitivity determinations of internuclear distances i
n rotational-echo double-resonance experiments and simulations performed on
C-13 and N-15- labeled L-alanine. (C) 2000 Academic Press.