用于零场核磁共振探测的无自旋交换弛豫原子磁力仪

发布时间：2018-01-14 00:32

本文关键词：用于零场核磁共振探测的无自旋交换弛豫原子磁力仪　出处：《中国激光》2017年10期 　论文类型：期刊论文

【摘要】：研制了用于液体零场核磁共振探测的无自旋交换弛豫(SERF)铷原子磁力仪。通过实验测量原子的磁共振曲线,验证了磁力仪工作在SERF状态,且结果与理论相符。采用增加光强的方法提高磁力仪带宽,满足了液体零场核磁共振的带宽需求,磁力仪在20~300Hz频率范围内的灵敏度低于18fT/Hz1/2。用基于磁力仪研制的液体零场核磁共振装置对甲酸样品进行测量,得到了13 C标记的甲酸的零场核磁共振谱,验证了磁力仪的可用性。
[Abstract]:A rubidium atomic magnetometer without spin exchange relaxation (SERF) for liquid zero field NMR detection is developed. The magnetic resonance curves of the atoms are measured experimentally to verify that the magnetometer works in the SERF state. The results are in agreement with the theory. The method of increasing the intensity of light is used to increase the bandwidth of magnetometer, which satisfies the bandwidth requirement of liquid zero-field nuclear magnetic resonance. The sensitivity of the magnetometer in the frequency range of 20 ~ 300Hz is less than that of 18fT / Hz1 / 2. The formic acid sample is measured with a liquid zero-field NMR device based on the magnetometer. The zero field NMR spectra of 13 C labeled formic acid were obtained, and the availability of the magnetometer was verified.
【作者单位】：中国科学技术大学近代物理系中国科学院微观磁共振重点实验室;中国科学技术大学量子信息与量子科技前沿协同创新中心;
【基金】：国家973计划(2013CB921800,2014CB848700) 国家杰出青年科学基金(11425523) 国家自然科学基金(11375167,11661161018,11227901) 中国科学院B类战略性先导科技专项(XDB01030400)
【分类号】：TM936.1
【正文快照】： 碱金属原子磁力仪利用与碱金属原子能级共振的光来产生和探测原子极化,通过原子在磁场中的拉莫1004001-1进动获取磁场的信息,是一种灵敏的磁场探测技术[1-9]。其中,利用无自旋交换弛豫(SERF)状态下原子的极窄线宽特性[10-12]实现的原子磁力仪[8-9,13],其灵敏度量子极限约为2aT

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