在强辐射阻尼存在下完全反转态的线型(英文)  

THE LINESHAPE OF AN UNSTABLE COMPLETE INVERSION STATE IN THE PRESENCE OF STRONG RADIATION DAMPING

作　　者：罗会俊[1] 王复[1] 史新梅[1] 潘铁英[1] 

机构地区：[1]华东理工大学分析测试中心,上海200237

出　　处：《波谱学杂志》2000年第3期197-201,共5页Chinese Journal of Magnetic Resonance

基　　金：ThisworkwassupportedbytheECUST BRUKERjointNMRlaboratory(Shanghai,China)

摘　　要：在 1 8 0°脉冲加z方向脉冲梯度场作用后 ,采样得到 90 %水样的自由感应衰减信号 ,其具有几乎完整的双曲正割函数特征 ,并通过付立叶变换得到其频谱 ,发现其具有强烈的震荡特征 ,这与通常用不完善的 1 80°单脉冲观测到的相位畸变有所不同 ,并且发现这种强震荡只有在强辐射阻尼存在下以及θ0 非常接近 1 80°时才能观测到 .在辐射阻尼线型理论基础上 ,合理的理论计算已进行 ,我们得到了与实验观测相当一致的结果 .For the strong radiation damping case(i.e.,9 0%H\-2O in D\-2O), it has been found experimentally that when the initial angle of the magnetization relative to the B\-0 direction, θ\-0, is very clos e to π, the Fourier transformed spectra corresponding to the FIDs with hyperbolic envel ope are characteristic of very strong oscillation, which is apparently different from that obtained with near-π pulse. This great oscillating feature can be r easonably explained in terms of the radiation damping lineshape theory.

关 键 词：FT-NMR 线型 辐射阻尼 震荡 完全反转态 

分 类 号：O482.532[理学—固体物理]