正电子

Once an antiproton and positron have joined forces, the resulting antihydrogen atom is electrically neutral and thus no longer caged by the electrical fields in the trap.

一旦一个反质子和正电子具有了结合的力量，产生的反氢原子是中性的，结果在线圈中不再受电场束缚。

The nuclide chart involves electron, positron, antiproton, antineutron, photon to exhibit the symmetry of mass and charge ideally.

该核素图将电子、正电子、反质子、反中子和光子收录在内，完美地表现了质量和电荷的对称性。

The atom drifts to where it wants to go, said Dr. Landua, namely the wall where its components will annihilate with their opposite numbers in a characteristic pattern: the antiproton into a spray of lighter particles called pions, and the positron producing a flash of gamma rays.

Landua 博士说，&原子随意漂流&，即组成的墙壁会消灭以相反特性存在的粒子数：反质子进入比较轻的称作介子的粒子雾里，而正电子产生伽马射线闪光。

The different adsorbed species such as sulfates sulfites and adsorbed sulfur dioxides under various temperature, pressure and evacuated treatment conditions were characterized by in situ-IR. In the absent of oxygen, two bands were observed at 1050cm〓 and 1330cm〓, the former is the weakly chemisorbed sulfur dioxide species and the latter is the strongly chemisorbed SO〓.

首次利用正电子淹没技术求取了CeO〓在MgAl〓O〓上单层分布的阈值为0.075g／gMgAl〓O〓，此值略小于利用XRD法求取的单层分布阈值0.08g／gMgAl〓O〓，并且发现催化剂的氧化吸硫活性，O-Ps的生成率与CeO〓的负载量之间良好的对应关系，当CeO〓在MgAl〓O〓上形成单层分布时，O-Ps的生成率最小，此时，催化剂的活性最优。

Investigation on the effect of Sn/Pb - dopped Bi - 2212 superconductors has been canied out by the X - raydiffraction, together with simultaneous measurements of the spectra Of POsitron annihilation lifetime and positronDoppler broadening.

以X射线物相分析为主要实验手段，并结合正电子寿命谱和多普勒展宽谱和电阻测量，系统地研究了在不同的锡掺杂量下，Bi－2212超导相结构细节及电子态的变化。

While this is going on, the ground sends up its own chain of shorter, positively charged leaders.

在这个过程中，地面的正电子也会不断向上产生吸引，产生正负极的吸引链。

Analogously, putting these changing regular time after time to the known transformation of various elemental particles from electron and positron to neutrino, to various meson, to various hyperon, to proton, to neutron, to various atom, can all be agree well with actual observation results.

类似地，将这种变换规律逐次用于已知的，由电子、正电子到中微子，到各种介子，到各种超子，到质子，到中子，到各种原子的，各种基本粒子的转化情况，都能与实际观测结果很好地相符。

If they are correct, it would explain the newly observed abundance of high-energy positrons.

如果他们假设的模型是对的，这就可以解释新近观察到的大量高能量的正电子。

Normally, it is impossible to distinguish Cherenkov radiation generated by positrons from that created by electrons.

通常电子和正电子创造的切伦科夫辐射是不可能区分开的。

So we build, starting around 1970, a special machine in which we collided electrons positrons.

因此，我们建立，从1970年左右，一个特别机器中，我们相撞电子正电子。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。