Abstract
Application of three short radio frequency pulses within the spin-spin relaxation time T2D to a solid containing half-integer spins with a distribution of quadrupole splittings is shown to produce a number of stimulated echoes. When the interval T between the second and third pulse is made greater than T2D, only the primary stimulated echo following the third pulse remains. It is found experimentally to decay as a function of T in a non-exponential manner, and has little temperature dependence. A semi-phenomenological theory is developed to explain the echo amplitude variation. The essential features of the echo amplitude variation are explained, and the detailed deviations from the theory are discussed.
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