In anticipation of using fluctuations in the nuclear dipolar and quadrupolar interaction as a probe of lithium ion motion in lithium borate glasses, the static values of these interactions were measured using a variety of echo techniques. The static quadrupolar echo spectrum of (7)Li and a calculation of the dipolar interaction in crystalline Li(2)B(4)O(7) (same chemical composition as the glass under study) were used to estimate the strength of the two interactions. These indicate that the dipolar and quadrupolar interactions for (6)Li will be of similar size and the dipolar interaction will be dominated by the unlike spin interaction between the (6)Li and the (10)B, (11)B spins. An appropriate theoretical model is proposed and explicit expressions for the echo amplitude are calculated in terms of the dipolar and quadrupolar second moments. This single spin model takes into account the quadrupolar interaction but treats the dipolar interaction as an effective magnetic field. Experimental results are presented which show the essential validity of the model and measurements lead to reasonable values for the dipolar and quadrupolar second moments. The relative merits of the various echo techniques are discussed.

中文翻译：

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（6）硼酸锂玻璃中的Li NMR。

预期将核偶极和四极相互作用的波动用作硼酸锂玻璃中锂离子运动的探针，这些相互作用的静态值使用多种回波技术进行了测量。（7）Li的静态四极回波谱和晶体Li（2）B（4）O（7）（与研究中的玻璃相同的化学组成）的偶极相互作用的计算用于估算两者的强度互动。这些表明（6）Li的偶极和四极相互作用将具有相似的大小，并且偶极相互作用将由（6）Li和（10）B，（11）B自旋之间不同的自旋相互作用主导。提出了一个合适的理论模型，并根据偶极和四极矩计算了回波幅度的明确表达式。该单自旋模型考虑了四极相互作用，但将偶极相互作用视为有效磁场。实验结果表明模型的基本有效性，并且测量结果得出了偶极和四极矩的合理值。讨论了各种回波技术的相对优点。