Transverse relaxation of spin-polarized 3He gas due to a magnetic field gradient.
Transverse relaxation of spin-polarized 3He gas due to a magnetic field gradient.
复制标题
由于磁场梯度导致自旋极化 3He 气体的横向弛豫。
DOI：
10.1103/physreva.41.2631
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
Douglas D. McGregor
中科院分区：
文献类型：
--
作者：
Douglas D. McGregor
在含有自旋极化{sup 3}He气体的样品池中，磁场梯度的存在将导致横向弛豫速率的增加。这种弛豫机制的起源是由于原子在整个细胞中扩散时所看到的波动磁场导致原子的相位相干性损失。Redfield理论的松弛由于随机波动的磁场被施加到产量表达式的横向弛豫率为球形和圆柱形的样品细胞。用实验{sup 3}He自由旋进磁强计进行的实验给出了与理论一致的结果。
The presence of a magnetic field gradient in a sample cell containing spin-polarized {sup 3}He gas will cause an increased transverse relaxation rate. The origin of this relaxation mechanism is the loss of phase coherence of the atoms due to the fluctuating magnetic field seen by the atoms as they diffuse throughout the cell. The Redfield theory of relaxation due to randomly fluctuating magnetic fields is applied to yield expressions for the transverse relaxation rate for spherical and cylindrical sample cells. Experiments performed with an experimental {sup 3}He free-precession magnetometer give results in agreement with the theory.