粉末样品中氘核NMR的回波序列

波谱学杂志 ›› 1991, Vol. 8 ›› Issue (3): 333-340.

粉末样品中氘核NMR的回波序列

李鲠颖, 邬学文

华东师范大学分析测试中心上海 200062

收稿日期:1990-08-16 出版日期:1991-09-05 发布日期:2018-01-20
基金资助:
The project supported by National Natural Science Foundation of China

ECHO EXCITATION OF DEUTERIUM NMR IN POWDERS

Li Gengying, Wu Xuewen

NMR Laboratory, Analytical Center, East China Normal University, Shanghai 200062

Received:1990-08-16 Online:1991-09-05 Published:2018-01-20
Supported by:
The project supported by National Natural Science Foundation of China

摘要/Abstract

摘要： 本文提出一个回波序列,它由四个90和一个45脉冲构成,具有较宽的激发带宽和较短的激发时间,可用于氘核NMR固体线型的测量之中,数值计算结果表明该回波序列的激发带宽几乎比传统的四极回波宽一倍。²D-PMMA粉末样品的实验结果证实了本文设计的回波序列的优越性。

关键词: ²D-NMR, 宽带激发, 回波序列

Abstract: An echo sequence with broad band excitation bandwidth and shortexcitation time is proposed for use in deuterium NMR system in powders, which consists of four 90°pulses and an additional single pulse with flip angle of about 45° It is shown by numerical calculations that the excitation bandwidth of the ECHO sequence is nearly twice as broad as that of the conventional quadrupole echo sequence. The superiority of the ECHO sequence over the conventional quadrupole echo sequence is confirmed experimentally by a ²D-PMMA powder sample.

Key words: ²D-NMR, Broadband excitation, Echo sequence

李鲠颖, 邬学文. 粉末样品中氘核NMR的回波序列[J]. 波谱学杂志, 1991, 8(3): 333-340.

Li Gengying, Wu Xuewen. ECHO EXCITATION OF DEUTERIUM NMR IN POWDERS[J]. Chinese Journal of Magnetic Resonance, 1991, 8(3): 333-340.

[1]	李鲠颖, 邬学文. 自旋3/2粉末样品四极核中心跃迁的NMR回波序列[J]. 波谱学杂志, 1989, 6(4): 431-438.
[2]	李鲠颖, 王东生, 邬学文. 固态NMR中自旋Ⅰ=1体系的魔术回波序列[J]. 波谱学杂志, 1988, 5(4): 341-348.