用晶体衍射法测量中子电偶极矩
Measurement of the neutron electric dipole moment by crystal diffraction
摘要：
为了研究该方法的统计灵敏度和系统效应，利用一个原型装置，通过测量非中心对称晶体（石英）的自旋转动来寻找中子电偶极矩。事实证明，该方法的概念是有效的。实验的初步结果是$d_{\rm n}=(2.5\pm 6.5)\cdot 10^{-24}$ e $\cdot $ cm。实验表明，利用现有的石英晶体和中子束，在100天的数据采集中，可以获得$\sim 2.5\cdot 10^{-26}$ e $\cdot $ cm的精度。
英文摘要：
An experiment using a prototype setup to search for the neutron electric dipole moment by measuring spin-rotation in a non-centrosymmetric crystal (quartz) was carried out to investigate statistical sensitivity and systematic effects of the method. It has been demonstrated that the concept of the method works. The preliminary result of the experiment is $d_{\rm n}=(2.5\pm 6.5)\cdot 10^{-24}$ e$\cdot $cm. The experiment showed that an accuracy of $\sim 2.5\cdot 10^{-26}$ e$\cdot $cm can be obtained in 100 days data taking, using available quartz crystals and neutron beams.
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