The first type discovered -- alpha decay -- is when a radioactive particle emits a Helium nucleus !

我们发现的第一种衰变方式——阿尔法衰变——是放射性粒子产生氦分子！

A radioactive particle moving in a blood stream causes transient changes of dose rate near its path.

当一个放射性物质在血流中移动时在它的路径附近引起剂量率的瞬间变化。

Conclusion the radioactive particle implantation in tumor brachytherapy is a new, effective and minimally invasive therapy.

结论放射性粒子近距离治疗各种肿瘤效果明显，为一种新的微创治疗肿瘤的手段。

Methods Respective summarized the operative matching points of 50 patients with maxillofacial malignant tumor when cured by radioactive particle implantation.

方法回顾分析50例颌面部恶性肿瘤患者放射性粒子组织间植入治疗的护理配合要点。

Objective in the accident conditions, the radioactive particle size and diffusion characteristics and its inhalation risk of plutonium dioxide were further investigated.

目的进一步研究在事故状态下，氧化钚放射性微粒的扩散特征和粒度特征及其吸入危险性。

Objective To summarize the effect of radioactive particle implantation in brachytherapy for different kinds of tumors in 8 hospital, and explore the feasibility of the therapy.

目的总结8家医院对放射性粒子近距离治疗各种肿瘤的疗效，探索其治疗肿瘤的可行性。

Atmospheric neutron is the main radioactive particle in the near space that induced single event effects (SEE) and seriously imperils the safety of the aircraft at this altitude.

大气中子是这一区域诱发元器件发生单粒子效应最主要的原因，严重威胁着临近空间飞行器安全、可靠地工作。

Not a single particle leaked radioactive material-strong evidence of the fuel's safety.

没有任何一颗粒子泄漏放射性物质——这是燃料安全性的一个有力证据。

As viewed from applications the nuclear technology mainly includes the technology of ray and particle beams, and the technology of radioactive nuclides.

从应用的角度讲，核技术主要包括射线和粒子束技术与放射性核素技术。

A transverse field gas ionization chamber for particle identification at the Radioactive ion Beam Line in Lanzhou (RIBLL) is described.

描述了一种将用于兰州放射性束流线较重离子鉴别的多阳极横向场电离室。