放射釷 的英文怎麼說
中文拼音 [fàngshètǔ]
放射釷
英文
radiothorium-
It is important that study gamma - ray spectrometry of field rock and soil in the earth ' s crust. its energies range between 30kev and 3000kev, where there is much information of natural radioactive nuclides, such as uranium, thorium, potassium, and information of artificial radioactive nuclides, such as cesium, americium, cobalt, and information of the results in interaction between gamma - ray and earth ' s crust
研究表明：野外地面射線能譜測量主要研究地殼巖石土壤中產生的能量約為30kev 3000kev的射線，這裡面包含著鈾、釷、鉀等天然放射性核素信息，核工程活動產生的大量人工放射性核素信息以及射線與地殼相互作用產生的相關信息。Regulations for safe management of radioactive wastes from the mining and milling of uranium and thorium ores
鈾釷礦冶放射性廢物安全管理技術規定Cerium - tungsten electrode, a new type of non - radiate electrode material invented in china, can not only replace the thorium - tungsten electrode in the case of low direct current and mini - scaled welding but also bears superior features over the latter
鈰鎢電極是我國研製發明的新型無放射性的電極材料，在低電流直流條件下和小規格焊接可取代釷鎢電極，並且有更優越的性能。Lanthanum - tungsten electrode is the substitution product of thorium - tungsten electrode because of its freedom from radioactivity. its other advantage is its endurance of high current and low burn spoilage rate
鑭鎢電極因無放射性而成為較有發展前景的釷鎢電極的替代產品。它的另一優點是耐用電流高而燒損率最小。Because of sub - critical safety, fully using of the thorium - uranium resources and efficiency disposal high - radioactivity waste, this research has become the hot pot
因為具有次臨界安全性、充分利用釷、鈾資源和高放射性廢物的處置三大優點，成為研究的熱點。Most of earth ' s internal heat is generated by four long - lived radioisotopes ? potassium 40, thorium 232, uranium 235 and uranium 238 ? that release energy over billions of years as they decay into stable isotopes
地球內部的熱能主要來自半衰期較長的四種放射性同位素鉀40 、釷232 、鈾235與鈾238 ，它們在幾十億年來逐漸衰變成穩定的同位素，同時釋放能量。分享友人