摘要
论述了原子核系统磁化强度的的弛豫原理,分析了含水地层中氢质子磁化强度的弛豫过程,推导出磁化强度的布洛赫方程,从而给出接受线圈中感应电动势的衰减规律,通过计算得到磁化强度各分量随时间的衰减过程以及感应电动势的衰减曲线,分析了纵向弛豫和横向弛豫时间常数与磁化强度各分量和感应电动势的关系。
The relaxation principle of the atomic nucleus system magnetization is discussed in this paper. Relaxation of hydrogen macroscopic nuclear magnetization is analyzed, Bloch equation of nuclear magnetization is given, free induction decay in receiving coil is presented, and relaxation about components of the nuclear magnetization and free induction decay is computed. In addition, the relationship of nuclear magnetization and free induction decay to the longitudinal and transverse time constants is analyzed.
出处
《物探与化探》
CAS
CSCD
2005年第2期153-156,160,共5页
Geophysical and Geochemical Exploration
关键词
氢质子
核磁共振
拉莫尔频率
磁化强度
感应电动势
弛豫
nuclear magnetic resonance
nuclear magnetization
Larmor frequency
free induction decay
relaxation
