positron

So, the antiparticle of the normal electron is called the positron, as it has a positive charge, but the same mass as the electron.

这样，正常电子的反粒子叫做正（阳）电子，如同它有一个阳电荷一样，但是与电子的质量一样。

Some of these gamma rays pass near atomic nuclei, in the process transforming into an electron and a positron, researchers said.

某些伽马射线在靠近原子核的附近经过，进入到转化为个电子和正电子的过程，研究人员说。

For instance, the antimatter opposite of an electron, known as a positron, is positively charged.

例如，电子的反物质就是带正电的质子。

Total cross sections for positron scattering on potassium were calculated at low energies by means of the coupled channels-optical method.

应用耦合通道光学势方法计算低能正电子同钾原子碰撞的总散射截面。

Next the antiatoms encounter a strong electric field that strips apart the antiproton and positron of the weakly bound antiatoms .

接著，反原子会遇到一个强电场，把束缚松散的反原子里的反质子及正子给拆开。

It was only in 1932, when the electron's antimatter sibling, the positron, was sighted in cosmic rays that such a thing was found to exist.

只有当1932年与电子相反的兄弟，正电子，在宇宙射线中被发现的时候，才证明这种物质的确存在。

An atom of antihydrogen, for instance, is composed of a negatively-charged antiproton being orbited by a positively-charged positron.

举例来说，一个反氢原子，由带正电荷的正电子围绕带负电荷轨道运行的反质子组成。

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。

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。

A positron is an anti-electron, a mirror-image particle with the same properties as an electron, but an opposite, positive charge.

一个正电子则是一个反电子，即与一个电子有相同属性的镜象粒子，只是其电荷性质相反即带正电荷。

By means of positron annihilation lifetime spectra (PALS), the free volume of polymer could be tested.

通过正电子湮没寿命谱技术（PALS）探测聚合物的自由体积特性，能够了解聚合物的微观性质。

Positron Emission Tomography Study of Regional Cerebral Metabolism during General Anesthesia with Xenon in Humans.

氙气全身麻醉时对于人类局部区域脑代谢的正电子扫描图像研究。

Positron emission tomography, or PET, is nuclear cardiac imaging for optimally assessing blood flow in the heart.

正电子发射体层摄影术，或宠物，是核心脏成像，为最大限度地评估血流在心里。

Attenuation correction in positron emission tomography (PET) is an essential part of clinical and research studies.

衰减校正在正电子发射断层扫描技术（PET）是一个重要组成部分的临床和研究。

The antihydrogen atoms are composed of a positron (an antimatter electron) orbiting an antiproton nucleus.

反氢原子是正电子（所谓正电子就是反物质的电子）围绕着以反质子为核心，作轨道运行所形成。

Some radioactive substances emit positrons, the antiparticles to electrons, and are used in PET (positron-emission tomography) scans.

有些放射性物质会放出正子，它是电子的反粒子，已经应用于正子断层扫描（PET）。

Positron emission tomography (PET) is a molecular imaging technique with particularly broad application in drug discovery and development.

正电子发射断层扫描技术（PET）是一种分子成像技术，特别是广泛应用在药物发现和开发。

An infected vascular graft was identified using a combined positron emission tomography (PET) and computerized tomography (CT) system.

受感染的血管被确定使用结合正电子发射断层扫描技术（PET）和计算机断层扫描（CT）系统。

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。

Positron and electron (particle and anti-particle) can annihilate in collision turning into electromagnetic radiation.

正电子和电子（粒子和反粒子）在对撞中会发生湮灭，并产生电磁辐射。