摘要
采用新型脉冲核磁共振实验仪对核磁共振实验进行了教学实践研究,利用自由感应衰减信号(FID信号)测得几种物质的表观横向弛豫时间,利用自旋回波信号(SE信号)测得几种物质的横向弛豫时间。对不同浓度的硫酸铜溶液的横向弛豫时间进行测量,并讨论了弛豫时间随浓度变化的原因。实验研究结果表明自旋回波信号能相对准确地测出物质的横向弛豫时间,且弛豫时间与浓度大小成反比。
The teaching practice of nuclear magnetic resonance experiment is studied by using a new pulse nuclear magnetic resonance experimental instrument.The apparent transverse relaxation time of several substances is measured by free induction attenuation signal(FID),and the transverse relaxation time of several substances is measured by spin echo signal(SE).The transverse relaxation time of copper sulfate solution with different concentrations is measured,and the reason why the relaxation time changed with the concentration is discussed.The experimental results show that the spin echo signal can measure the transverse relaxation time of matter relatively accurately,and the relaxation time is inversely proportional to the concentration.
作者
郝世明
王晓飞
Hao Shiming;Wang Xiaofei(School of Physical Engineering,Henan University of Science and Technology,Luoyang,471023,China)
出处
《中国现代教育装备》
2021年第21期43-45,共3页
China Modern Educational Equipment
基金
河南省高等教育教学改革研究项目“注重创新能力的物理实用型人才培养的研究与实践”(编号:2012SJGLX149)
河南科技大学教育教学改革研究与实践项目“应用物理学专业优秀基层教学组织建设与管理的研究与实践”(编号:2019YB049)
河南科技大学教育教学改革研究与实践项目“‘互联网+’背景下近代物理实验教学模式创新的探索”(编号:2019JC-YB-09)。
关键词
核磁共振
自由感应衰减信号
自旋回波信号
弛豫时间
nuclear magnetic resonance
free induction attenuation signal
spin echo signal
relaxation time
