查询词典 positrons

However, it is unclear whether these positrons can escape from the stellar debris in sufficient quantity to explain the size of the observed cloud.

然而，尚不清楚是否有足够数量的正电子能够逃离恒星残骸以解释观察得到云团的大小。

Some astronomers have suggested that exploding stars could produce the positrons.

一些天文学家猜测爆炸的恒星能够产生这些正电子。

Beta particles are either electron s or positrons.

粒子可以是电子或正电子。

Indeed, the team found that, at the highest energies they could measure, the ratio of positrons to electrons was far higher than at lower energies.

实际上，该研究团发现，在他们所能测量的高能范围内，正电子与电子的比例要比低能范围内的高得多。

At lower temperature, positrons detected also negative ions as positron shallow traps.

另外，在低温下形变样品中还存在正电子浅捕获态。

After that, they discovered high- energy positrons — the Grande Latte'' of subatomic particles – which, they deduced, must have been produced from dark matter.

在此之后，他们发现高能量正电子-的大铁''的亚原子粒子-其中，他们推断，必须从已生产出了暗物质。

The longest lifetime component in PALS results is ascribed to the annihilation of positronium in cavities of PS sample. It is found that 80% of the positrons implanted in PS film have formed positronium atoms. PALS results show that the lifetime of ortho-Positronium has small value when the sample was in oxygen gas medium compared with those in other medium.

正电子湮没寿命谱测试结果表明，样品中存在长达40ns的电子偶素湮没成分，并且进入多孔硅膜层的正电子约有80%形成电子偶素，具有非常高的电子偶素产额；在氧气气氛下，由于气体导致o-Ps发生自旋转化猝灭是使多孔硅样品中电子偶素寿命缩短的主要原因。

I am sure after a few weeks of adaptation and familiarization I will have no difficulty in functioning on a daily basis in an English speaking society or in participating fully in graduate studies.

在大学的三年的学习生活不仅给予我自身的充实，更重要的是磨练和培养了我较强的自觉能力和严谨，踏实的作风以及不怕困难的精神，对未来充满了信心！

As the first volcanoes erupted, one of the gases that bellowed out was steam.

在第一批火山喷发时，喷出的气体之一就是水蒸汽。