波谱学杂志 ›› 1988, Vol. 5 ›› Issue (3): 245-254.

• 研究论文 • 上一篇    下一篇

组合脉冲宽带去耦

李大庆, 吴钦义   

  1. 中国科学院武汉物理研究院
  • 收稿日期:1987-09-11 修回日期:1987-11-26 出版日期:1988-09-05 发布日期:2018-01-22

COMPOSITE PULSE BROADBAND DECOUPING

Li Daqing, Wu Qinyi   

  1. Wuhan Institute of Physics, Academia Sinica
  • Received:1987-09-11 Revised:1987-11-26 Online:1988-09-05 Published:2018-01-22

摘要: 本文在理论分析的基础上,提出了一新的用于异核宽带去耦的组合脉冲:90°(X)150°(Y)70°(-Y)150°(Y)90°(X)。理论和实验表明,由此组合脉冲组成的去耦序列:NEW-16、NEW-32,去耦谱宽比常用的去耦序列:MLEV-16、WALTZ-16的去耦谱宽增加约30%。本文还提出了一种电路,使现已提出的大多数组合脉冲去耦序列,能在Varian XL-200 NMB谱仪上实现。

关键词: 宽带去耦, 去耦序列, 去耦谱宽, 组合脉冲, 偏共振效应, 超循环

Abstract: In this paper, a new composite pulse 90°(X)150°(Y)70°(-Y)150°(Y)90° (X) is proposed for broadband heteronuclear decoupling based on theory analysis. Theory and experiments show that the decoupling sequences. NEW-16 and NEW -32, which are incorporated by the new composite pulse, have about 30% wider decoupling bandwidth than the sequences:MLEV-16 and WALTZ-16,which are usually used for broadband decoupling. A circuit is suggested for a practical implementation of most composite pulse decoupling sequences with the Varian XL -200 NMR spectrometer.

Key words: broadband decoupling, decoupling sequence, decoupling bandwidth, composite pulse, resonance offset effect, supercycle