自旋3/2粉末样品四极核中心跃迁的NMR回波序列

NMR ECHO SEQUENCE IN THE CENTRAL TRANSITION OF SPIN-3/2 QUADRUPOLAR SYSTEMS IN POWDERED SAMPLES

本文提出脉冲序列45_X~°—t_1—90_(±Y)~°—t_2,从理论和实验上证实了它能够有效地会聚粉末样品中I=3/2四极核中心跃迁的磁化矢量,并对该回波序列的激发谱宽作了数值计算。

A pulse sequence 45x°t1-90±y°t2 is proposed for the spin echo of I = 3/2 spin systems in powder samples , which is confirmed theoretically and experimentally . It can effectively refocuse the magnetization of the central transition in spin-3/2 quadrupole nuclear systems . And the numerical calculated excitation bandwidth of the echo sequence is also given .