粉末样品中自旋3/2核体系中心跃迁的布居数反转

波谱学杂志 ›› 1990, Vol. 7 ›› Issue (1): 17-24.

粉末样品中自旋3/2核体系中心跃迁的布居数反转

李鲠颖, 邬学文

华东师范大学物理系, 上海

收稿日期:1988-10-15 修回日期:1988-12-30 出版日期:1990-03-05 发布日期:2018-01-23

POPULATION INVERSION OF THE CENTRAL TRANSITION OF SPIN-3/2 NUCLEAR SYSTEMS IN POWDER SAMPLES

Li Gengying, Wu Xuewen

Department of Physics, East China Normal University, Shanghai

Received:1988-10-15 Revised:1988-12-30 Online:1990-03-05 Published:2018-01-23

摘要/Abstract

摘要： 在有限脉冲宽度条件下,本文利用矢量模型与计算机模拟设计了一个组合180°脉冲:45°_x112.5°_y45°_x,可以均匀地将自旋I=3/2核体系中心跃迁的布居数反转。并且用数值计算方法对该组合180°脉冲的布居数反转效果进行了分析。实验上用Na₂SO₄粉末样品进行了验证。

关键词: 粉末样品, 四极核中心跃迁, 布居数反转

Abstract: Under the condition of finite pulse width, using a vector model and computer simulation, the present paper proposed a composite 180° pulse:45°_x 112. 5°_y 45°_x, for uniform population inversion in the central transition of spin-3/2 nuclear systems. And the performance of population inversion of the composite 180° pulse was obtained by numerical calculation and confirmed by experimental results of ²³Na NMR spectra in Na₂SO₄ powder sample.

Key words: Powder sample, Central transition of quadrupolar nucleus, Population inversion

李鲠颖, 邬学文. 粉末样品中自旋3/2核体系中心跃迁的布居数反转[J]. 波谱学杂志, 1990, 7(1): 17-24.

Li Gengying, Wu Xuewen. POPULATION INVERSION OF THE CENTRAL TRANSITION OF SPIN-3/2 NUCLEAR SYSTEMS IN POWDER SAMPLES[J]. Chinese Journal of Magnetic Resonance, 1990, 7(1): 17-24.

[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中的宽带布居数反转[J]. 波谱学杂志, 1988, 5(3): 255-260.
[3]	章宪权, 吴肖令, 邬学文. 玻璃和晶体粉末样品的核磁共振谱的计算机拟合[J]. 波谱学杂志, 1988, 5(2): 129-140.