The Atomic Bomb Essay

2447 words - 10 pages

BOOM! The first detonation of an atomic bomb was on July 16,1945 on Hiroshima, Japan . That was one of the reasons why I picked this topic. Another reason was that there is lots of information on the atomic bomb out there and the last reason is I wanted to know why the atomic bomb has great explosive power. The main part of an atomic bomb is of course an atom. So that is what I'm going to say first.The AtomAtoms are everything. It is your paper, your house, your clothes, and everything else. Atoms is the smallest thing on earth. You can fit a million atoms in about the width of a piece of paper. You can't see them with the naked eye or with the best microscope in the world. The sciencists ...view middle of the document...

The atoms structure is relatively the same, but the added or subtracted weight may cause the atom to have new properties such as being fissionable) uranium-235 or plutonuim-239. Then the nucleus splits into two halves. Each half of the nucleus has about the same amount of neutrons and protons. When the nucleus splits a great deal of thermal energy and gamma rays and two or more neutron are given off. Under some conditions those neutrons that were released come back and strike again. Then you two split halves of a nucleus. Then they give off the same thing and the neutrons come back and strike again, and again. This chain reaction results in which almost all the fissionable material is blown up. This cause the great explosion.All isotopes of uranium are fissionable, but uranium-235 is better than uranium-238 because it goes under fission quicker and gives off more neutrons per fission than Uranuim-238 or any other isotopes of uranium. plutonium-239 has the same characteristics of uranium-239. Both uranium-235 and plutonium-239 are used in the atomic bomb. If you use a small amount say .45 kg(1 lb) of uranium-235 or plutonium-239 it can't under go the chain reaction that is needed and is called subcritical. It can't undergo the chain reaction because the average of the neutrons released by the fission are likely not to hit another nucleus. Then if more of uranium-239 or plutonium-239 is added there is a higher percentage of neutrons hitting the nucleus. At the point when critical mass has been acomblished, and a chain reaction the explosion will be created.All subcritical fissionable material must be brought up to critical state extremely quick. One way to do that is to take two subcitical masses together at one point. When you combined those two subcritical masses you will achieve critical mass. How you do it is you use two high explosives to shoot the subcrital masses of fissionable material together in a hollow tube. The second way is to use an implosion, which instead of blow up outward it blows up inward, by which the core of fissionable material is very quickly compressed into a smaller size. This makes the fissionable material more dense; which means the nuclei are packed in tighter and have a better chance of the neutrons hitting the nuclei. The outer layer of the implosion-type Atomic Bomb is a sphere or a bunch of concentric shells of fission able material is covered by explosives, are simultaneously detonated, implode the fissionable material under great persure into a denser mass which automacticly achieves critical mass.The use of a tamper;which is a coat of beryllium oxide or some thing else around the fissionable material; reflects some of the neutrons trying to escape and put back to strike more. More help is used by a "boosted fission" devices which incorporate such fissionable material as deuterium or tritium in the core. This boosts the fission by adding a great abundance of neutrons.When the bomb is done, 1 kg(2.2 lb) of uranium...

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