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A central laboratory to design both bombs was established at the so-called Site Y near Los Alamos, N.M.,with Dr. J. Robert information Oppenheimer in charge. A small city was built in the mountains of New Mexico where several hundred professors, specialists, workers and their families moved in secrecy. The first bomb dropped was called Trinity and from all reports information was noticed by the people in New Mexico within a 100 mile radius. The rapid spontaneous fission rate of plutonium 239 necessitated that a different type of bomb be designed. A gun-type bomb would not be information fast enough to work. Before the bomb could be assembled, a few stray neutrons would have been emitted, and these would start a premature chain reaction‚ leading to a great reduction in the energy released. Seth Neddermeyer, a scientist at Los Alamos, developed the idea of using explosive charges to compress a sphere of plutonium very rapidly to a density sufficient to make it go critical and produce a nuclear explosion.
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