有没有用英语介绍核弹的文章?
发布网友
发布时间：2023-04-27 20:17
共1个回答
热心网友
时间：2023-10-24 15:49
问题描述:
要较简单的，不要那种介绍原理之类的，要介绍一下核弹的历史，还有资料之类的，谢谢
解析:
The atomic bomb originated in 1939. Doctor Albert Einstein convinced Franklin Roosevelt to fund development of the bomb. U.S. scientists worked in extreme secrecy to finish the bomb, which they told the Army was ready for use by 1943. On August 6, 1945, the B-29 flew struck Hiroshima, Japan, on the world's first atomic bombing mission. Three days later another fighter-bomber dropped the plutonium bomb on Nagasaki. The Japanese surrendered in the following days thereby ending World War II.
These are bombs whose huge explosive power is caused by a sudden release of energy resulting from the splitting of nuclei of a heavy chemical element such as plutonium or uranium by neutrons in a very rapid chain reaction.
Uranium Bomb-the nuclear bomb that was dropped on Hiroshima was a gun-type uranium bomb. Uranium is supposedly the material of choice for terrorists since the design is simple, although highly enriched U-235, the main element, is not easy to make.
Plutonium Bomb-the bomb dropped on Nagasaki was a plutonium bomb, using the element Pu-239. Plutonium is not hard to obtain and is proced in most nuclear reactors. It can then be separated using chemistry. A higher ponent of the element, Pu-240, is highly radioactive and often tends to pre-detonate bombs before the chain reaction is plete. An implosion design is used to prevent this, but because the process is difficult, it isn't very likely a *** all terrorist group could do it without some sort of state help.
The United Nations has proclaimed April 26, International Day in Memory of Chernobyl, Ukraine, where a nuclear reactor accident had taken place in 1986.
