摘要
用虚拟1/2自旋算符讨论了核四极共振(NQR)中自旋I=1的自旋系统对激发脉冲宽度和频率偏置的响应。用单脉冲和双脉冲来观测的核四极共振信号与理论预期相符合。此外还证明,若只考虑射频场在分子电场梯度(EPG)张量主轴坐标系(PAS)中的一个轴上的分量(即有效射频场分量)的作用,就可用NMR矢量模型来处理I=1的核自旋系统。
The NQR responses of the nuclear spin system with I=1 to frequency offsetsand pulse widths are examined with fictitious 1/2-spin operator formalism. The tra-nsverse magnetization and longitudinal magnetization are observed with one pulse andtwo pulses sequence,respectively.The experimental results measured with NQRprobe are consistant with theoretical calculations.It is shown that the NMR vector model can be applied to the NQR system for I=1 when the rf excitation is intro-duced on one axis in EFG principal axis frame.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
1994年第8期1371-1379,共9页
Acta Physica Sinica
基金
国家自然科学基金