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第二次世界大战期间,美国搞了一个代号为“曼哈顿工程计划”的原子弹试制计划,为此专门设立了一个名叫曼哈顿工程区的试验基地。基地共有15万人,由十二位著名物理学家为核心领导,其中有费密、费曼、劳伦斯、奥本海默等人。到了1945年春,原子弹试制工作进入最后的投弹装置及引爆机构的试验。大家知道,当一个慢中子击中铀235原子核时,铀核被轰裂成两块飞出,同时放出2、3个中子;这些中子又会成为新的“炮弹”去轰击另外一些铀核,重复上述过程;条件合适时,这种过程便会一直延续下去形成链
During World War II, the United States engaged in an atomic bomb pilot program codenamed “The Manhattan Project” and set up a special test base called the Manhattan Project Zone. A total of 150,000 base, led by twelve prominent physicists as the core, including Fermi, Feynman, Lawrence, Oppenheimer and others. By the spring of 1945, the atomic bomb trial work entered the final test of bombing devices and detonators. As we all know, when a slow neutron hits the 235 nucleus of uranium, the uranium nucleus is detonated into two pieces and two or three neutrons are emitted at the same time. These neutrons will again become new “shells” Some other uranium nuclei, repeat the process; when the conditions are right, this process will continue to form a chain