uranium-239

uranium-239什么意思,uranium-239翻译

例句

• the commonest isotope of uranium; it is not fissionable but when irradiated with neutrons it produces fissionable plutonium 239.

  铀最常见的同位素，不能裂变，但与中子一起被照射后会产生可裂变的钚。

• An atomic bomb uses conventional explosives to slam together two lumps of fissionable material, usually uranium-235 or plutonium-239.

  原子弹利用常规爆炸让铀235和钚239这两块分裂性原料相互撞击。

• Nuclear fission can only occur in some types of heavy and unstable nuclei such as in the uranium -235 and plutonium -239.

  核裂变只能在某种类型的重核及不稳定核素内发生，如铀-235及钚-239。