原子是由原子核和绕核旋转的若干负电子组成。
The atom is made up of a nucleus with negative electrons revolving around it.
我们的正负电子对撞机工程在全世界也是居于前列的。
The engineering of the electron-positron collider that we have completed also ranks among the world's most advanced technologies.
北京谱仪是北京正负电子对撞机上的高能物理实验装置。
Beijing Spectrometer (BES) is an experimental facility of high energy physics on Beijing Electron Positron Collider (BEPC).
北京正负电子对撞机(BEPC)是用于高能物理研究的国家重点实验室。
Beijing Electron Positron Collider (BEPC) is the State Key lab of our country in high physics research.
然后当你真的让它们，离得很近时，这两个离子周围的负电子云能感应到对方。
But, can you see that as you get really close together the negative electronic cloud surrounding the two ions start to sense one another.
出于脉冲星中粒子加速问题，讨论外电场中注入的正负电子对静电不稳定性。
Motivated by the particle acceleration problem in pulsars, it is numerically investigated for electrostatic instability of electron-positron pairs injected in an external electric field.
快速实时的亮度监测器将为升级后的北京正负电子对撞机的操作提供很大帮助。
A fast and real time luminosity monitor will be helpful to Beijing Electron Positron Collider (BEPC) after its upgrade.
北京正负电子对撞机上的BES实验为系统地进行重子谱研究提供了一个很好的舞台。
The BES experiment at Beijing electron-position collider provides an excellent laboratory for the research of Baryon spectroscopy.
金刚石因具有高硬度、高热导率、负电子亲和势等优点而成为场发射阴极的首选材料之一。
With the merits of high hardness, high thermal conduction, negative electron affinity, diamond is deemed one of the preferred materials of the field emission cathode.
本文主要介绍了包括我们近期的工作在内的超强场下真空产生正负电子对的动理学方法研究及其进展。
This paper mainly introduces the research and progress of vacuum electron positron pair production in ultra-intense fields studied by kinetic method, which also includes our recent works.
北京正负电子对撞机上的最新实验研究结果在高灵敏度水平上展现了粲夸克偶素物理中的强衰变之谜。
Recent experimental results obtained at Beijing Electron-proton Collider sensitivity level the crisply defined natrue of the hadronic decay puzzle in charmonium physics.
这一方法在北京正负电子对撞机（BEPC）磁铁场公差的确定和磁铁场性能研究中已得到有效的应用。
The method has successfully found its application in theBEPC magnet tolerance study as well as field qu…
我们已经展示了人工放射现象的可能性，这种放射现象的特征是用以射线轰击用咄硼和镁中的正电子或负电子。
We have shown that it is possible to create a radioactivity characterized by the emission of positive or negative electrons in boron and magnesium by bombardment with alpha rays.
他们分析了在LNGS所收集到的有关中微子束的数据，可是并没有发现来自中微子正负电子对辐射的任何证据。
They have analyzed data collected from the neutrino beam at LNGS and have found no evidence of radiation or electron-positron pairs coming from the neutrinos.
此外，为了同时测量对撞点处正、负电子束的位置，两套带有8电极的特殊束流位置探测器(BPM)将安装在对撞点两侧。
Moreover, in order to measure the positions of both positron and electron in the IP at the same time, two special BPMs with 8-bu.
本文提供了北京正负电子对撞机同步辐射光束线上X射线能谱的首次测量结果，文章对探测器和谱仪系统、测量方法及数据分析予以扼要的描述。
This paper provides the first measurement results of X-ray spectrum at the beam lines of synchrotron radiation. It describes the detector and spectral system, measuring method and data acquisition.
本文提供了北京正负电子对撞机同步辐射光束线上X射线能谱的首次测量结果，文章对探测器和谱仪系统、测量方法及数据分析予以扼要的描述。
This paper provides the first measurement results of X-ray spectrum at the beam lines of synchrotron radiation. It describes the detector and spectral system, measuring method and data acquisition.
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