查询词典 radioactive decay

Radioactive decay studies have found a kinds of elements can be α or β decay and the decay into another element, while the α-decay product of -α-rays became one of the deep structure of the material means of .1911, the Rutherford and others bombarded atoms with α-rays observed wide-angle deflection to determine the nuclear structure of atoms and nuclei was first proposed the term .1919 year, Rutherford and others have also found that with α-ray bombardment of nitrogen will release the nuclear protons, this is the first time Artificial realization of a nuclear reaction, after the bombardment of nuclei with the radiation caused by nuclear reaction method to become the primary means of research in nuclear.

放射性衰变研究发现了一种元素可以通过α衰变或β衰变而变成另外一种元素，而α衰变的产物——α射线又成了人们探讨物质深层结构的手段。1911年，卢瑟福等人用α射线轰击原子、观察到大角度偏折，从而确定了原子的有核结构，并首次提出原子核这一名词。1919年，卢瑟福等人又发现用α射线轰击氮核会放出质子，这是首次用人工实现的核反应，以后用射线轰击原子核来引起核反应的方法逐渐成为研究原子核的主要手段。

From radioactive equilibrium of natural radioactive decay series and content of several radioactive constituents, the formula for estimating activity of uranium ore and solid waste is derived and a case study on treatment engineering of decommissioning Linchang Uranium Mine is presented.

文摘：根据天然放射性衰变系列的平衡关系，推出了通过若干个而非全部放射性组分的监测数据来计算铀矿石和固体废弃物中放射性活度的公式，给出了临沧铀矿退役治理工程的估算实例。

Firstly, to work out the distribution features of underground nuclear explosion radioactive leak and γ-ray intensity of infinite uniform radioactive sample and limit radioactive sample inborehole axle.

对核爆炸放射性泄漏分布特征进行了理论计算，研究了无限均匀放射性样品和有限厚放射性样品γ射线沿井轴的分布计算。

The results radicate that the radioactive matter containing of domestic solid wastes in living district of Pearl River Refine Plant and r-radiation level of radioactive solid wastes and the part of radioactive matter in landfill site's surface is higher than that in city domestic wastes and world soil average level reported by the UN...

结果珠江冶炼厂居住区固体废弃物及填埋场区r辐射水平和部分放射性物质含量高于市区生活固体废弃物。

The high rotten coal (including the anthracite and meager coal ) radioactive level is relatively low,( 238U: 29.1Bq/kg , 232Th: 25.9Bq/kg , 226Ra: 37.5Bq/kg), obviously lower than the radioactive levels of the brown coal and bituminous coal, and fluctuating range little relatively stable until Lincang uranium germanium colliery HeKai Tian little dragon's pool power plant make , investigate than right far correctly, prove natural radioactive nuclide (238U , 232Th , 226Ra ) than activity transformation in the course of utilizing and give locality radiate influence that environment bring.

高变质煤放射性水平相对较低，（238U：29.1Bq/kg、232Th：25.9Bq/kg、226Ra：37.5Bq/kg），明显低于褐煤和烟煤的放射性水平，且波动范围较小、相对稳定通过对临沧铀锗煤矿田和开远小龙潭电厂作出调查比对，说明了天然放射性核素（238U、232Th、226Ra）比活度在利用过程中的转移以及给当地放射环境带来的影响。

The liquid radioactive contamination comes from the radioactive substances produced by the circulatory cooled water activated after neutron radiation;the solid radioactive contamination comes from the match plate in the hot working chamber,the collimation equipment...

液态放射性污染主要指加速器冷却循环水受中子照射被活化形成放射性物质；固体放射性污染为热室工作箱内的模板，退役加速器离子源、准直器和靶周围被活化的器件及与放射性制剂分装、注射相关的用品；放射性气态污染，主要指中子使空气活化产生核素11C、13N、15O、41Ar，空气中其它成份被中子活化产额低，多为气溶胶状态；另外放射性表面污染主要指加速器厅内被活化的固体器件，冷却水破裂或放射性药物意外污染，有关传递通道和贮源容器的表面放射性污染。

Great attention has been paid to the threat of the highly radioactive and the low-level radioactive waste from nuclear industry and the radioactive waste has become a more and more serious problem with the waste from medical industry and research institutions. The uranium from uranium minings has caused the pollution of groundwater around.

核工业生产中产生的高、中、低放废物对环境构成的威胁越来越受到重视，它们与医疗、科研、国防事业的核废物一起成为越来越严重的环境问题，尤其是铀矿冶中产生的U对地下水的污染。

There are 8.6%~10.91% foreign matter in the sphenes, in which radioactive elements of strontium, cesium and uranium range from 4.26% to 4.58%. The change of structural cell parameters of sphenes is still very little,Δa=-0.0009 nm~0.0041 nm,Δb=0.0018 nm~0.0004 nm,Δc=0.0002 nm~0.0048 nm,Δβ=-0.10°~0.09° with high crystallinity of 99.27%~96.46%. Though, the age of sphene from the Fenghuang Mountain is about 1000 Ma, and experienced 775 Ma~1758 Ma geological evolvement and alpha decay, its crystallinity only decreased 3%, and its crystal shape and structure are still fine, indicating that sphene is of good ability to solidify radioactive elements. Therefore, sphenes are ideal minerals for solidifying nucleus waste.

通过对北祁连牛心山变质杂岩体中榍石(775Ma)和山西凤凰山花岗岩中榍石(1758Ma)的XRD及EDS等测试与研究，结果表明：两地榍石的杂质元素质量分数高达8.6%~10.91%，放射性核素锶、铯和铀的质量分数达4.26%~4.58%；晶胞参数的变化极小，△a=-0.0009nm~0.0041nm、△b=0.0018nm~0.0004nm、△c=0.0002nm~-0.0048nm、△β=-0.10°~0.09°，结晶度仍高达99.27%~96.46%，榍石经过10×10^8a的地质作用，结晶度仅减少了3%，显示榍石固化放射性系列核素的能力较强，虽经历了约775Ma~1758Ma的复杂地质演化及其所含放射性核素的衰变作用，其晶体结构完好，稳定性极高，是值得期待的理想核废物固化矿物。

Any of several radioactive gases that are isotope s of radon and are products of radioactive decay.

"几种氡的同位素的放射性气体，是放射性物质衰变的产物。"

Any of several radioactive gases that are isotopes of radon and are products of radioactive decay.

"几种氡的同位素的放射性气体，是放射性物质衰变的产物。"

We stopped by the old fashion ice cream parlor Manhattan Beach Creamery for some refreshment. The "No Shoes, No Shirt, No Problem" sign on the wall epitomizes the beach lifestyle.

我们去商店区的一家老式冰淇淋店坐坐，墙上挂著「没鞋，没上衣，没问题」的牌子完全捕捉了海滩生活的随性及风格。

"If therefore", argues Bellarmine we can offer our prayers and our satisfactions in behalf of those detained in purgatory, because we are members of the great body of Christ, why may not the Vicar of Christ apply to the same souls the superabundant satisfaction of Christ and his saints--of which he is the dispenser?

" "因此，如果"，认为贝拉明（德indulgentiis ，十四）"我们可以提供我们的祈祷和我们满意的代表那些被拘留在炼狱，因为我们是成员的伟大基督的奥体，为什麼可能不是牧师基督适用於同样的灵魂满意的过剩是耶稣和他的圣人-他是在配药？