Detection of NMR signals with a radio-frequency atomic magnetometer
Detection of NMR signals with a radio-frequency atomic magnetometer
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DOI：
10.1016/j.jmr.2006.12.012
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发表时间：
2007-04-01
影响因子：
2.2
通讯作者：
Romalis, M. V.
中科院分区：
文献类型：
--
作者：
Savukov, I. M.;Seltzer, S. J.;Romalis, M. V.
我们演示了质子NMR信号的检测与射频（RF）原子磁力计调谐到62 kHz的NMR频率。原子磁力计的高频操作使其对环境磁场噪声相对不敏感。我们获得的磁场灵敏度为7 fT/Hz（1/2），只用一个薄的铝屏蔽。我们还推导出一个表达式的基本灵敏度限制的表面感应拾波线圈作为频率的函数，并发现原子射频磁强计本质上是更敏感的比线圈的可比大小的频率低于约50 MHz。(C)2006年爱思唯尔公司All rights reserved.
We demonstrate detection of proton NMR signals with a radio-frequency (rf) atomic magnetometer tuned to the NMR frequency of 62 kHz. High-frequency operation of the atomic magnetometer makes it relatively insensitive to ambient magnetic field noise. We obtain magnetic field sensitivity of 7 fT/Hz(1/2) using only a thin aluminum shield. We also derive an expression for the fundamental sensitivity limit of a surface inductive pick-up coil as a function of frequency and find that an atomic rf magnetometer is intrinsically more sensitive than a coil of comparable size for frequencies below about 50 MHz. (C) 2006 Elsevier Inc. All rights reserved.