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本文通过计入异核偶极相互作用的非久期项对交叉极化弛豫速率的影响而推广交叉极化理论。自旋系统内部的快运动可以使得异核偶极相互作用的非久期项对交叉弛豫的贡献变得可观。本文给出了交叉弛豫速率的一般公式,并讨论了本理论在交叉极化实验中的应用。
In this paper, we introduce the theory of cross-polarization by including the effect of non-term term of heteronuclear dipole interaction on the cross-polarization relaxation rate. The fast motion inside the spin system can make the contribution of non-prolongation terms of heteronuclear dipole interaction to cross-relaxation significant. This paper gives a general formula for the cross relaxation rate and discusses the application of this theory in cross-polarization experiments.