Efficient longitudinal relaxation time measurement of 129Xe via bias-approach

Efficient longitudinal relaxation time measurement of 129Xe via bias-approach
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通过偏置方法有效测量 129Xe 的纵向弛豫时间

DOI:
10.1063/1.5049178
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发表时间:
2018-09
期刊:
影响因子:
1.6
通讯作者:
Zhao Hongchang
Zhao Hongchang
中科院分区:
材料科学4区
文献类型:
--
作者:
Zhan Xiang;Jiang Qiyuan;Wang Zhiguo;Luo Hui;Zhao Hongchang

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我们提出了一种新的测量~(129)Xe纵向弛豫时间的偏置方法。与延迟脉冲法相比,单扫描偏置方法的测量时间显著缩短了20多倍,两个样品单元A和B的测量时间分别相差2%和0.7%。通过在横磁区施加一个小的静磁场,获得了π脉冲感应87Rb磁强计相对于氙气纵向磁化强度的信号偏置。然后,我们使用π/2脉冲来计算纵向弛豫的半衰期。由于偏置法对系统的稳健性要求较低,因此它自然成为测量蒸汽室中惰性气体纵向弛豫时间的一种更有效的方法。
We proposed a new bias-approach method for measuring longitudinal relaxation time of 129Xe. Compared with the delayed pulse method, the measuring time of the proposed single-scan bias-approach is significantly decreased by more than 20 times, and the differences are 2% and 0.7% of two sample cell A and B respectively. By giving a small static magnetic field in the transverse domain, a π-pulse-induced 87Rb magnetometer signal bias with respect to the longitudinal magnetization of xenon was obtained. We then use a π/2 pulse to find the half-life time of longitudinal relaxation. Since the bias-approach has a low requirement of the systematic robust, it naturally becomes a more efficient method to measure the longitudinal relaxation time with respect to the noble gas in the vapor cell.
DOI: 10.1016/s1090-7807(03)00186-1
发表时间: 2003-10-01
影响因子: 2.2
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高灵敏度原子磁力计对超极化 Xe-129 的快速纵向弛豫测量
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