大学物理 ›› 2010, Vol. 29 ›› Issue (7): 28-28.

• 著者文摘 • 上一篇    下一篇

样品弛豫时间对核磁共振信号的影响研究

廖红波 张仲秋 王海燕   

  1. 北京师范大学物理学系,北京100875
  • 出版日期:2010-07-25 发布日期:2010-07-20

Study of the influence of the transverse relaxation time on the NMR signal

  • Online:2010-07-25 Published:2010-07-20

摘要: 研究了不同浓度CuSiO4水溶液样品的核磁共振信号的特点,讨论了在特定的磁场扫场周期下,样品横向弛豫时间对共振信号的影响.发现当样品的横向弛豫时间远远大于扫场周期时,微观磁矩的退相是造成核磁共振信号衰减的主要因素,此时在共振点前后都会形成周期性的振荡信号.

关键词: 核磁共振, 表观弛豫, 横向弛豫, 磁矩的退相

Abstract: In this paper, we employe a set of CuSiO4 solutions with different concentrations to study the influence of the transverse relaxation time on the NMR signal. When the transverse relaxation time of these samples is much longer than the period of the scanning magnetic field, the dephasing of the micro-magnetic moment is found to be the main factor which resuhes in the decreasing of the NMR signal. In this case, the periodical oscillating NMR singals can be observed both before and after the resonance.

Key words: NMR, apparent relaxation time, transverse relaxation, dephasing of the magnetic monent

中图分类号: 

  • O482.53