β Scribed by N. Boden; P.K. Kahol
No coin nor oath required. For personal study only.
An anaiytic11 expression has been obtained for the spin response to a resomnt YO"-r-fig puIse sequenrr for a model of two dipoiar coupled spins-l. each subject to local electric field gradients_ The faihrre of the "time-xpansion method" to account for previous experimental observations on deuterium spins in solids is exphined. The expression provides new insight into echo formation and a more accurate description of experimental resuIts than was hitherto obtained by numerical prOCfXI-The effects of dipolar interactions on the spinecho response to resonant 90"-r-4, sequences in powdered perdeuterated moiecular crystak have recently been investigated [I -31. It was observed that for an XY sequence
π SIMILAR VOLUMES
The theory of the formation of NMR multiple echoes for isotoexchange model predicts that the exchange in solid parapic impurities ( HD ) in solid para-H 2 has been developed for the H 2 would be comparable to that observed in solid 3 He case of weak quantum tunneling of the impurities. The results w
We are very grateful to the Plastics Division of General Electric Corp. for making the GE Omega spectrometer available to the Purdue University School of Chemical Engineering. The authors thank Dr. T. Early and Dr. P. M. Henrichs for helpful discussions. J.B.G. also thanks BASF for providing researc