正电子

It has been known for many years that an electron and its antiparticle, the positron, may together form a metastable hydrogen-like atom, known as positronium or Ps ref.

多年前科学家就已经知道，一个电子和它的反粒子，即正电子，能够结合形成一个亚稳态的、像氢原子一样的原子，被称为positronium。

It has been known for many years that an electron and its antiparticle, the positron, may together form a metastable hydrogen-like atom, known as positronium or Ps ref.

多年前科学家就已经知道，1个电子和它的反粒子，即正电子，能够结合形成1个亚稳态的、像氢原子1样的原子，被称为positronium。

It has been known for many years that an electron and its antiparticle, the positron, may together form a metastable hydrogen-like atom, known as positronium or Ps ref.

核心提示：多年前科学家就已经知道，1个电子和它的反粒子，即正电子，能够结合形成1个亚稳态的、像氢原子1样的原子，被称为positronium。

The correlation between the positronium annihilationmechanism to the microstructure indicates that PALS is novel useful tool to study thecalixarene and its supramolecule system.

讨论了三个o-Ps湮没成分与其结构的对应关系，并说明了当杯[8]芳烃与〓形成超分子结构后对正电子寿命的影响，由此拓展了研究超分子体系的新工具。

Even bellow the energy threshold for positronium formation, the laser can supply the extra energy to form a Ps atom.

对于激光辅助正电子对原子的重排反应，电子偶素的形成伴随着多光子过程发生，即使入射能量低于Ps形成阈值，辐射场可提供额外的能量形成电子偶素。

Positronium atoms,[168] synthetic Penicillin,[169] synthetic self-replicating molecules,[170] and the genetic bases for Lou Gehrig's disease and Huntington's disease were first discovered at MIT.

此外，正电子原子，人工合成盘尼西林，人工合成的自我复制分子以及鲁格里克式病，亨廷顿式病的基因根源等成果均是在麻省理工掀开了面纱。

AMOC results reveal that S parameter of three lifetime components in oxygen are all bigger than that in nitrogen atmosphere. These are probably caused by the oxygen making the spin-conversion of positronium atoms.

结合正电子寿命-动量关联谱测量结果，本工作分析了不同气氛下多孔硅样品中电子偶素湮没寿命及动量变化关系，讨论了多孔硅中电子偶素的湮没机制以及气氛对孔径计算理论模型的影响。

The relative small o-Ps lifetime (1.48—1.63ns) can beexplained by the rigidity and high packing density of molecule chain, due to theintrachain and interchain hydrogen bond interaction respectively, whereas in 〓-containing chitosan, the grafted 〓 that play a significant chemical inhibition andquenching role on positronium formation and annihilation is first observed.

CS的相对小的尺寸和较低的自由体积浓度归因于氢键作用而致分子链较为致密的堆砌，在〓-CS中首次发现了〓基团对正电子素湮没的抑制和猝灭作用，此时〓和〓不再直接对应于自由体积尺寸和浓度。

The annealing behavior of double-space in the neutron irradiation Czochralski silicon is studied by Fourier transform infrared spectrometer technique and positron annihilation spectroscopy.

利用傅立叶红外吸收光谱和正电子湮没技术对快中子辐照直拉硅中的双空位(V2)的退火行为进行了研究。

It contains divine light, atom , proton , electron , neutron , anti-proton, photon, anti-electron, antineutron, and also anti-energy and antimatter particles that exist in and make up your aura or auric field .

它含有神性的光、原子、质子、电子、中子，反-质子，光子，正电子，反中性子，同样也有反-能量和反物质粒子在光环里存在和由光环或金场组成。

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％。