Solid-echo in solids with molecular motions: Effects of nonzero pulse widths

The effects of nonzero pulse widths on the solid-echo signals in solids with molecular motions have been investigated. It has been shown that in the slow-motion region (M 2τ c 2 ≈ 1) the amplitude of the echo signal is reduced and the maximum of the echo signal is shifted to the end of the second pulse. Comparison of the developed theory with experimental results obtained on polycrystalline C6H6 and NH4Cl demonstrates good agreement between them.