波谱学杂志 ›› 1999, Vol. 16 ›› Issue (6): 505-511.

• 研究论文 • 上一篇    下一篇

高阶多量子跃迁的一维直接检测——Raman磁共振方法

周志发1,2, 缪希茄1, 黄永仁2, 叶朝辉1   

  1. 1. 中国科学院武汉物理与数学研究所 波谱与原子分子物理国家重点实验室, 武汉 430071;
    2. 华东师范大学分析测试中心, 上海 20062
  • 收稿日期:1999-04-07 修回日期:1999-09-03 出版日期:1999-12-05 发布日期:2018-01-13
  • 作者简介:周志发,男,1972年出生,博士生
  • 基金资助:
    国家自然科学基金(No.19574067)资助项目

ONE-DIMENSIONAL DETECTION OF HIGHER-ORDER MULTIPLE QUANTUM TRANSITIONS BY RAMAN MAGNETIC RESONANCE

ZHOU Zhifa1,2, MIAO Xijia1, HUANG Yongren2, YE Chaohui1   

  1. 1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071;
    2. NMR Lab., Analytical Center, East Normal Universityt Shanghai 200062
  • Received:1999-04-07 Revised:1999-09-03 Online:1999-12-05 Published:2018-01-13

摘要: 研究了异核AX3自旋体系的初始态为最高阶量子相干态时的Raman磁共振谱.研究表明,唯有制备高阶多量子相干的初始态时才有可能对高阶多量子跃迁进行有效检测.积算符理论的精确性使得理论上准确地预言了Raman磁共振谱中各阶多量子跃迁频率、谱线强度,使得各阶多量子跃迁频率相互交错时仍有可能解析谱图.在Raman磁共振实验中采用了正负频偏交替变化采样的方法,对单量子信号进行压制,使其更有效地观察高阶多量子跃迁.

关键词: 核磁共振, Raman磁共振谱, 多量子相干, 积算符理论, 异核AXAXn自旋体系

Abstract: Raman Magnetic Resonance (RMR) spectroscopy for a heteronuclear AX3 spin system isrecorded by perturbing the highest-order quantum coherence state. The RMR experimentshows that an effective way for detecting higher-order quantum transitions is to prepare thehigher-order multiple quantum (MQ) coherence in the initial state. The product operatorformalism provides an exact method to predict arbitrary order MQ frequencies and intensitiesof RMR spectroscopy. By means of accumulation of Positive-negative alternate offset, thestrong single quantum signals are suppressed and hence the MQ transition signals can be detected with a higher efficiency.

Key words: NMR, Raman Magnetic Resonance, MQ Coherence, Product Operator Formalism, Heteronuclear AX3 Spin System