It was a very difficult first step to accept the positron.
接受正电子是艰难的第一步。
The result is that the electron shadow and the positron shadow are separated.
结果将使得电子的阴影和正电子的阴影被分开。
Later, electron and positron pairs were actually produced in laboratory experiments.
之后，电子与正电子对也最终在实验室中被制造出来。
The electron - positron pair may survive without recombining.
电子-正电子偶可以存在下来而不再复合。
The vacancy defects of samples were measured by slow positron annihilation.
借助慢正电子湮没技术研究了样品的空位型缺陷。
The new collider has to provide exact measurements of electron-positron annihilation.
新型的对撞机必须提供电子-正电子湮灭的准确测量结果。
After an immeasurably short time interval, the electron - positron pair recombine .
电子―正电子偶经过一个不可测量的短暂时间间隔后就重新复合。
The fraction is dependent on the target material, temperature and incident positron energy.
转换率依赖于靶材料、靶温度和入射慢正电子能量。
We investigate physicss properties of positronium and the way of positron - electron annihilation.
探讨正电子偶素的物理性质以及正电子—电子对的湮灭方式。
Objective To evaluate the value of high energy positron imaging in the diagnosis of colon neoplasm.
目的评估高能正电子成像技术在结肠肿瘤诊断中的临床实用价值。
Molecular imaging with positron emission tomography (PET) is an important field of molecular imaging.
正电子发射断层(PET)分子影像学是分子影像学的重要内容。
Blackett was really the first to obtain hard evidence for the existence of a positron but he was afraid to publish it.
布莱克特几乎是第一个发现正电子存在的有力证据的人，但他却没敢发表这个结果。
The detector has been used in theinvestigation of positron camera, it also offers possibility for X-ray detection.
这种探测器已经被用在正电子相机研究工作中，也可以用于探测X射线。
Optical absorption spectra and positron annihilation radiation Doppler broadening were measured at room temperature.
在室温条件下测量了吸收光谱与正电子湮没辐射多普勒展宽谱。
From earlier results using much less data, the positron cloud seemed to be spherical and centred on the centre of the galaxy.
从使用较少数据的早期结果来看，正电子云似乎是呈球状位于银河中心。
Nickel, electrodeposited from twelve typical plating baths, were investigated by positron annihilation lifetime spectroscopy.
应用正电子湮没寿命谱研究了十二种典型镍镀层的结构缺陷。
PET, or positron emission tomography, is an imaging study that allows doctors to evaluate the use of certain substances by the brain.
即正电子放射断层摄影术，是一项成像研究，它能使医生评价大脑对某些物质的使用。
The engineering of the electron-positron collider that we have completed also ranks among the world's most advanced technologies.
我们的正负电子对撞机工程在全世界也是居于前列的。
It is shown that the positron annihilation technique is a powerful method for investigating the structure of the defects in metal.
可以看出，正电子湮没技术是研究金属微观缺陷结构的有力手段。
The AEBB-2000 accelerator is a unique facility for carrying out experiments with anti-parallel electron-positron beams of high energies.
AEBB- 2000加速器是一部特殊的设备，它能实现高能量的反平行电子-正电子束试验。
To the electron, the corresponding system is the positron, which was observed after the prediction in cosmic ray experiments by Anderson in 1932.
对电子来说，与其相对应的是正电子，后者被安德森于1932年在宇宙射线实验中发现。
These experimental results give the corresponding positron experiment data for the application of cuprate superconductors and study of the mechanism.
该研究结果为铜氧化物超导体的应用和机理研究提供了相应的正电子实验资料。
So while an electron has a negative charge, its antimatter counterpart, a positron, has a positive charge and they annihilate each other when they get too close.
所以，电子带负电，那它对应的反物质正电子就带正电，并且它俩如果靠太近就会湮灭掉。
A method of measuring positron lifetime is used to investigate temperature dependence of positron trapping at defects in neutron-irradiated silicon crystals.
用正电子湮没寿命测量方法研究了在中子辐照硅单晶缺陷中正电子捕获的温度效应。
Lisa Mosconi and colleagues at the New York University School of Medicine used positron emission tomography, or PET, scans to look at the brains of 53 normal elderly people.
美国纽约大学医学院的莉萨·墨斯科尼和其同事使用正电子发射断层成像(Positron Emission Tomography,PET)技术，对53名正常的中老年人进行了脑部扫描。
For decades, physicists at CERN and elsewhere have been trying to overcome these limitations with antihydrogen, which consists of a single positron orbiting a single antiproton.
几十年来，欧洲核子研究中心和其他地方的物理学家一直在想方设法克服反氢原子的这些局限。反氢原子由一个正电子与一个反质子构成，正电子绕反质子运行。
For decades, physicists at CERN and elsewhere have been trying to overcome these limitations with antihydrogen, which consists of a single positron orbiting a single antiproton.
几十年来，欧洲核子研究中心和其他地方的物理学家一直在想方设法克服反氢原子的这些局限。反氢原子由一个正电子与一个反质子构成，正电子绕反质子运行。
应用推荐