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positron

美 [ˈpɑzətrɑn]英 [ˈpɒzɪtrɒn]

n.正电子；阳电子
网络正子；反电子；正子电脑断层扫描

复数：positrons

positron

positron

权威英汉双解英-汉英-英网络释义

positron

n.

1

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。

3

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。

4

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。

5

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。

6

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。

7

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。

8

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。

9

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。

10

11

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。

16

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 ）。

21

Objective To summarize the key points of nursing patients with malignant tumor undergoing positron emission tomography (PET)-CT imaging .

目的总结肿瘤患者应用 18F-氟代脱氧葡萄糖（18F-FDG ）进行 PET-CT 显像检查的护理要点。

22

Objective : To discuss the nursing countermeasure for receiving high quality Positron Emission Tomography (PET) image .

目的：探讨正电子发射计算机断层显像检查中的护理方法。

24

This creates , as it were, electron and positron shadows .

这将产生电子和正电子的阴影带，正如月亮阴影带本身。

25

Increasing attention has been focused on synthesis radiopharmaceuticals for positron emission tomography (PET).

正电子放射性药物的合成是核技术应用领域的焦点之一。

26

This was confirmed by the positron annihilation technique .

正电子湮没技术证实了这种空位的存在。

30

The key of this technology depended on increasing batteries positron electrode -- zincous -- the electron that can carry .

这项技术的重点在于增加了电池正电子电极 ——阳极 ——所能携带的电子。

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