^(14)N核四极共振中自旋锁定的偏共振效应  

OFFSET EFFECTS OF SPIN-LOCKING IN^(14)N NUCLEAR QUADRUPOLAR RESONANCE

作　　者：夏佑林[1] 叶朝辉[1] 

机构地区：[1]中国科学院武汉物理研究所波谱与原子分子物理国家重点实验室,武汉430071

出　　处：《物理学报》1995年第6期970-976,共7页Acta Physica Sinica

基　　金：国家自然科学基金资助的课题

摘　　要：用虚拟自旋-1/2算符理论计算了核四极共振自旋系统在自旋锁定脉冲序列作用下的时间演化,获得了自旋锁定信号随锁定脉冲长度和射频频率偏置的变化关系。如果不考虑准备脉冲期间射频频率偏置的影响,那么可简单地用核磁共振中的矢量模型来解释自旋锁定这一现象。The time evolution of a NQR spin system irradiated by spin-locking pulse se-quence is examined with fictitious spin-1/2 operator formalism. The variation re-lations between spin-locking signal and the pulse lenth of locking pulse and frequ-ency offset are obtained. If the frequency offset during the preparation pulse is not considered, the spin-locking phenomenon can be explained with the vector model in NMR. The information of the dynamic process in molecule inside can be obtai-ned through the investigation of the spin-locking phenomenon.

关 键 词：NMR 核磁共振 氮14 偏共振效应 自旋锁定 

分 类 号：O482.532[理学—固体物理]