natural radioactive decay meaning in Chinese

放射性自然衰变
自然衰变

Alpha particles are positively charged helium nuclei obtained from natural radioactive decay .
粒子是从天然放射性蜕变得到的带正电的氦核。
His work was done before the discovery of radioactivity and the understanding that natural radioactive decay provides a source of heat to the earth
他的工作是做了，才发现放射性和谅解，即天然放射性衰变提供热源，以地球。
Although almost all this material , which has a 24 , 000 - year half - life , has since disappeared ( primarily through natural radioactive decay ) , some of the plutonium itself underwent fission , as attested by the presence of its characteristic fission products
这些物质半衰期为2万4000年，几乎已经全部消失（主要是经由自然的放射衰变过程），而且部份的钸本身又经过核分裂，这可由其核分裂产物为证。
Abstract : 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。