查询词典 positron

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 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。

As for the electron-positron collider, first I want to tell you a story.

说起我们这个正负电子对撞机工程，我先讲个故事。

This method can be generally applied to analyzing all-photon events at electron-positron collider.

该方法可普遍应用于正负电子对撞实验中纯中性事例的分析。

Helium gas purification technology is one of the key technologies in the cryogenic system of Beijing Electron-Positron Collider Upgrade.

氦气净化技术是国家大科学工程北京正负电子对撞机重大改造中低温系统的关键技术之一。

We addressed the systematic errors originated from the synchronized photoelectron beams, which desorbs quite a few gaseous molecules adsorbed on the vacuum chamber walls, in mesuring the base pressure of the large storage ring of Beijing electron positron collider.

当BEPCⅡ储存环的束流突然丢失时，真空计和离子泵的压力测量值都先有一个瞬时的减小，之后才逐渐降低到本底压力。

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。

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。

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％。