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| bbw videos , beryllium, subscription, video & electronic general, signed, fat people, novels, urban, turntable cases, directors, matthew faison, sex with fat women , newcitychicago, camera, | The gun-type method could still be used for highly-enriched uranium, though, and was employed in the "Little Boy" weapon which was used against Hiroshima, Japan. For a variety of reasons, the implosion method is both more efficient than the gun-type method, and also far safer, as a perfect new gaming information synchronization of the explosion lenses is required for the core to properly detonate, greatly reducing the chances of an accidental nuclear detonation. The "Trinity" device was similar new gaming information to the "Fat Man" bomb. Because of its complicated firing mechanism, and the need for previously untested synchronization of explosives and new gaming information precision design, it was felt that a full test of the concept was needed before the scientists and military representatives could be confident it would perform correctly under combat conditions. |
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| Lawrence's Radiation Laboratory in Berkeley, California. Because of the presence of the isotope Pu-240, reactor-bred signed plutonium had a much higher rate of spontaneous neutron emission than was previously thought, and if a gun-type device was used it would most likely pre-detonate and result in a messy and signed costly "fizzle". The spontaneous fission rate of Pu-240 is 415,000 fissions/(s·kg), and the amount was 0.9% of 6.2 kg, is 56 g. Thus there were 23,000 spontaneous fissions per second. This means that the last few centimeters would have to be travelled in signed preferably much less than 40 microseconds. It is theoretically possible to build a plutonium gun-type device, but it would need to be 19 feet long in order to allow the sub-critical masses to be fused into a critical mass before a fizzle occurs. The mass of a plutonium gun-type device would have been beyond the payload of the B-29. After this problem was realized in 1943, work began in earnest on the implosion bomb, the "Fat Man". |
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