稳态核磁共振实验中弛豫时间T_2的测量方法  

Measuring the relaxation time T_2 in nuclear magnetic resonance experiment

作　　者：杜晓波[1] 付成伟[1] 纪媛[1] 吕佳明 杨博闻 夏书涵 孙昕[1] 梁桁楠[1] 崔航[1] 龙北玉[1] DU Xiao-bo;FU Cheng-wei;JI Yuan;Lv Jia-ming;YANG Bo-wen;Xia Shu-han;SUN-Xin;LIANG Heng-nan;CUI Hang;LONG Bei-yu(Department of Physics,Jilin University,Changchun 130012,China)

机构地区：[1]吉林大学物理学院,吉林长春130012

出　　处：《物理实验》2018年第11期17-19,23,共4页Physics Experimentation

摘　　要：为解决稳态核磁共振实验中氟原子核横向弛豫时间T_2传统测量方法操作困难、测量精度差的问题,改进了实验仪器和测量方法.制作了测量线圈和电子积分器并用核磁共振方法进行标定,获得50Hz扫场信号.将此扫场信号输入到数字示波器x轴,获得了以50Hz交变磁场为横轴的共振吸收信号.用Origin软件对静态的吸收信号拟合处理,计算出T_2,误差小于3%.实验结果表明:该方法借助于Origin软件的数据处理能力,避免了传统测试方法中吸收信号抖动,测量操作更为容易.In order to simplify the measurement of relaxation time T 2 in the conventional nuclear magnetic resonance experiment,experimental instruments and measuring methods were improved.Detecting coil and integrator were made and calibrated to achieve the 50 Hz scanning signal,and the magnetic field dependent absorption signal was recorded.The absorption signal as well as the interference signal was fitted and calculated in Origin software,and the T 2 was obtained.The measurement result verified that this method was effective and precise.

关 键 词：稳态核磁共振 共振吸收信号 横向弛豫时间 ORIGIN 

分 类 号：O482.532[理学—固体物理]