摘要
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。
The cross polarization theory is generalized by taking into consideration the contribution of non -secular part of heteronuclear dipolar interaction Hamiltonian in laboratory frame (NSH) to cross polarization relaxation. The rapid lattice fluctuation ( ~108Hz) of a spin system will enhance the effect of NSH. The general formula of cross polarization relaxation rate is given. The application of this theory to cross polarization experiments is analysed and discussed.
出处
《波谱学杂志》
CAS
CSCD
1993年第2期123-130,共8页
Chinese Journal of Magnetic Resonance
基金
国家自然科学基金
中国科学院武汉物理研究所青年科学基金
关键词
交叉极化
非久期项
弛豫
速率
Cross polarization
Nonsecular terms
Thermodynamics of spin system
Spin dynamics .
