查询词典 sealed radioactive source

Promethium is metallic and emits a blue-green light, as it is highly radioactive.

钷是金属并发出蓝绿色光，具有高放射性。

It is better to use a neutron or proton rich projectile with atomic number notfar away from the expected exotic nuclei because the difference in the fragmentationcross section induced by neutron or proton rich and stable projectiles becomes smallwith the increase of the distance between the produced fragment and the projectile. Measurements of 〓 for 〓,〓 and 〓 at intermediate energieshave been performed on the Radioactive Ion Beam Line in Lanzhou.

所选的丰中子或丰质子炮弹最好离所需产生的丰中子或丰质子奇异核比较近，因为随着炮弹与产生的核的距离的增加，丰中子或丰质子炮弹与稳定的炮弹的碎裂反应产生奇异核的产生截面的差别变小。

Because of the radioactivity in waste water of rare earth factories,the purificatory principle of radioactive waste water,and adsorption of some clay minerals and soils for rare earth was studied.

基于稀土厂废水的放射性，吸取水质放射性污染净化原理与多种粘土矿物和土壤对稀土的吸附性，探讨稀土厂废水放射性的净化技术。

The technique is so sensitive that it can detect a single radioactive carbon atom hiding among a quadrillion ordinary ones.

这种技术是如此的灵敏以至于可以在百万的四次方个原子中找到某一个放射性碳原子。

It is a radiation hazard, because it can occur in two radioactive forms.

因为且有两种辐射形式而属於幅射危害物。

Nevertheless, major concerns have been raised about radiation hazard and safe disposal of radioactive waste.

虽然如此，放射线危险性及其废弃物是否安全处置常引起大眾关心。

Based upon monitoring results of radioactive materials in tunnel excavation construction in Qinling Tunnel the intensity of radioactivity and distribution regularities is summarized, meanwhile, preliminary assessment and research are conducted for radiation hazard and protection.

结合西康线秦岭特长隧道Ⅱ线平导开挖过程中对隧道放射性物质监测结果，针对隧道内放射性强度、分布规律进行了归纳、总结，并就其辐射危害及防护进行了初步评价和研究。

The point of the experiment is that radioactive decay is a quantum process.

这个实验的关键点是放射性衰变是一个量子过程。

The point of the experiment is that radioactive decay is a quantum proces s.

这项实验的关键因素在于放射性衰变是一个量子过程。

The half-life is the time taken for half of the atoms of a radioactive substance to decay.

的半衰期是花费的时间为半原子的放射性物质腐烂。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。