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radioactive decay 放射衰變。

radioactive dust

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:根據天然放射性衰變系列的平衡關系,推出了通過若干個而非全部放射性組分的監測數據來計算鈾礦石和固體廢棄物中放射性活度的公式,給出了臨滄鈾礦退役治理工程的估算實例。

It takes advantages of modern computer to fit all the experimental information , hence a very powerful pwa method . in this thesis , we use this method to analysis hadrons japdecay model jap - > ( ptt - tr + and j p radioactive decay model based on the pwa amplitude , we received mass distribution of two outgoing pious and angle distribution of the outgoing particles using the cern program . finally we compared tow different form factors ( barrier factors and gauss factor ) wh ich were always used the calculating of pwa amplitude 本文采用這種分析方法給出的j強衰變j ~ - ~ +和j粒子輻射衰變j ~ - ~ +分波振幅公式,利用cern的蒙特卡羅模擬程序繪出了末態粒子的角分布和不變質量分布,對分波分析中常用的兩種動力學形狀因子(中心位壘因子和高斯壓低因子)進行了研究比較。

The paper discusses basic principle , working method and data processing of radon surveying . considering radioactive decay of radon surveying data and many disturbing factors in the actual work , we require analysis , emendation and processing actual data 本文在論述了測氡的基本原理、工作方法及數據處理的基礎上,針對測氡數據放射性衰變的特點和在實際工作中受干擾因素較多等原因,要求對實測數據進行分析、校正與處理。

The spent fuels would be stored and cooled in the “ spent fuel pool “ inside the fuel building for about 10 years to allow for the radioactive decay of its nuclides and removal of the residual heat . the spent fuels would then be transported to remote site in the northwest region for either “乏燃料”會放在燃料廠房內水池中貯存約十年,進行冷卻排除馀熱,以及待其放射性因衰變而隨時間減退后,再運往西北偏遠地區進行

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 這些物質半衰期為2萬4000年,幾乎已經全部消失(主要是經由自然的放射衰變過程) ,而且部份的鈽本身又經過核分裂,這可由其核分裂產物為證。

Rays during radioactive decay . while giving the patient a very low radiation dose , technetium - 99m allows sufficient time for the diagnosis process . in therapy treatments , a radioisotope of iodine , iodine - 131 , is used to treat thyroid cancer 在治療方面,放射性同位素碘- 131用于醫治甲狀線癌;在治療某幾種癌癥時,亦會利用鈷- 60所放出的射線,射入人體內,將癌細胞殺死。

Only then did it became clear that the planet cools by moving heat , generated in its interior due to radioactive decay , by convection to the surface , where brittle plates are pushed past one another , generating earthquakes 只有那時,才清楚星球通過熱量的傳遞,即放射性衰減在星球內部產生的熱量,通過對流傳遞到星球表面,此處較脆的板塊從另一個板塊邊上推過,造成地震。

Rays during radioactive decay . while giving the patient a very low radiation dose , technetium - 99m allows sufficient time for the diagnosis process . in therapy treatments , a radioisotope of iodine , iodine - 131 , is used to treat thyroid cancer 在治療方面,放射性同位素碘- 131用于醫治甲狀線癌在治療某幾種癌癥時,亦會利用鈷- 60所放出的射線,射入人體內,將癌細胞殺死。

As soon as the plants or animals die , the uptake of carbon - 14 will cease and the amount of carbon - 14 will decrease with time due to radioactive decay . the half - life of carbon - 14 is about 5 , 730 years 但當植物和動物死去,他們便會停止吸取碳- 14 。碳- 14的份量因衰變會隨時間而減少,每經過一個半衰期(即大約5 , 730年) ,含量便會減半。

The spent fuels would be stored and cooled in the “ spent fuel pool “ inside the fuel building for about 10 years to allow for the radioactive decay of its nuclides and removal of the residual heat “乏燃料”會放在燃料廠房內水池中貯存約十年,進行冷卻排除馀熱,以及待其放射性因衰變而隨時間減退后,再運往西北偏遠地區進行

A new type of battery based on the radioactive decay of nuclear material is 10 times more powerful than similar prototypes and should last a decade or more without a charge , scientists announced 一種以核子物質放射衰變為基礎的新型電池,電力比類似的原型強上十倍,在不充電的情況下應可維持十年以上,科學家宣布。

And generate a considerable amount of heat due to radioactive decay . hence , it would be transported for storage in a “ spent fuel pool “ inside the fuel building situated adjacent to the containment building 及因衰變而產生的馀熱,因此會被傳送至毗鄰安全殼廠房的燃料廠房內的“乏燃料池“貯存。

And generate a considerable amount of heat due to radioactive decay . hence , it would be transported for storage in a “ spent fuel pool “ inside the fuel building situated adjacent to the containment building 及因衰變而產生的馀熱,因此會被傳送至毗鄰安全殼廠房的燃料廠房內的“乏燃料池“貯存。

Probably the best source for random numbers in common use is measuring radioactive decay . it s not at all easy to bias , and comes with relatively little natural bias 最后,我們將解釋如何在您自己的應用程序中建立防盜自動警報,以及侵入探測的現代方法可能對您有何幫助。

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,才發現放射性和諒解,即天然放射性衰變提供熱源,以地球。

From their work emerged the picture of radioactive decay that is still valid - a violently disruptive explosion of a single atom 根據他們的工作,展現出至今仍然成立的關于放射性衰變的圖象- -單個原子的強烈的分裂性爆炸。

Rays are emitted from the nuclei of unstable atoms during radioactive decay , while x - rays are from the electron cloud as the result of electron excitation 射線是由不穩定原子核射出的,而射線則由受激發的電子云射出。

One of our favorite ones involves the use of an electronic geiger counter that generates a pulse every time it detects a radioactive decay 它是一種無論代碼所處什么環境都保持一致的軟件靜態特性嗎?

These radionuclides undergo radioactive decay , by emitting harmful alpha particles , beta particles or gamma rays 它們在衰變期間會放出對人體有害的粒子、粒子或射線。