Measurement of a false electric dipole moment signal from 199Hg atoms exposed to an inhomogeneous magnetic field
Measurement of a false electric dipole moment signal from 199Hg atoms exposed to an inhomogeneous magnetic field
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DOI：
10.1140/epjd/e2015-60207-4
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发表时间：
2015-10-06
影响因子：
1.8
通讯作者：
Zsigmond, G.
中科院分区：
文献类型：
--
作者：
Afach, S.;Baker, C. A.;Zsigmond, G.
我们报告了对渗透有对齐磁场和电场的体积中包含的Hg-199原子的拉莫尔频移的测量，该频移与电场强度成正比。这种变化是由不可避免的磁场梯度和运动磁场之间的相互作用引起的。与电场强度的比例性使其明显类似于电偶极矩（EDM）信号，尽管与EDM不同，这种效应是P和T守恒的。我们已经使用了中子磁共振EDM光谱仪，具有汞的磁力计和外部铯磁力计的阵列，测量作为所施加的磁场梯度的函数的移位。我们的结果与理论预期吻合得很好。
We report on the measurement of a Larmor frequency shift proportional to the electric-field strength for Hg-199 atoms contained in a volume permeated with aligned magnetic and electric fields. This shift arises from the interplay between the inevitable magnetic field gradients and the motional magnetic field. The proportionality to electric-field strength makes it apparently similar to an electric dipole moment (EDM) signal, although unlike an EDM this effect is P- and T-conserving. We have used a neutron magnetic resonance EDM spectrometer, featuring a mercury co-magnetometer and an array of external cesium magnetometers, to measure the shift as a function of the applied magnetic field gradient. Our results are in good agreement with theoretical expectations.