Gaussian-Sinc脉冲的研究与计算机模拟  

Study and computer simulation on Gaussian-Sinc pulse

作　　者：许峰[1] 张家秀[1] 黄永仁[2] 

机构地区：[1]安徽理工大学数理系,淮南232001 [2]教育部光谱学与波谱学重点实验室华东师范大学物理系,上海200062

出　　处：《吉林大学学报（理学版）》2004年第2期246-250,共5页Journal of Jilin University:Science Edition

基　　金：安徽省教育厅自然科学基金(批准号:2002KJ225ZC).

摘　　要：根据Fourier变换原理提出Gaussian-Sinc型选择性脉冲,应用Bloch方程对其频谱进行了计算机模拟.根据模拟结果,研究了脉冲中的参数对频谱选择性、边瓣和位相的影响,结合特形脉冲的优化设计方法分析讨论了Gaussian-Sinc脉冲的优点和局限性,得出一系列的相关结论.通过实验观察了Gaussian-Sinc脉冲的选择性与边瓣,其结果与计算机模拟结果基本吻合.Gaussian-Sinc pulse is presented according to the Fourier transformation. Its frequency domain profiles were calculated by means of the analytical solutions of Bloch equations. The effects of parameter in Gaussian-Sinc pulse on the selective, side band and phase were studied. The advantages and defects of Gaussian-Sinc pulse are discussed and some valuable conclusions are gained. The corresponding experimental results coincide well with the above conclusions.

关 键 词：Gaussian-Sinc脉冲 计算机模拟 核磁共振 Gaussian-Sinc脉冲 FOURIER变换 BLOCH方程 边瓣抑制 选择性脉冲 

分 类 号：O482.532[理学—固体物理]