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Difference Between Hiroshima Atomic Bomb and Nagasaki Atomic Bomb

atomic-bombHiroshima Atomic Bomb vs Nagasaki Atomic Bomb

The allied powers comprising of USA and UK had prepared two powerful atomic bombs during the Second World War. The bombs were intended to explode the two prominent Japanese cities of Hiroshima and Nagasaki. By the order of the American President Harry S. Truman, these two devastating nuclear weapons were dropped on the doomed cities in August 1945. At a basic level both the atomic bombs were a lot different from each other.

The atomic bomb that was dropped on Hiroshima (Monday, August 6, 1945) was called the Little Boy. It was made from highly enriched Uranium- 235. The particular Diffusion Enrichment Technique was used in the preparation of this particular bomb. Minute diversifications in the mass of the two primary isotopes U-235 (originally 0.7% in the uranium) and U-238 which exists in majority were concentrated on. As like in UF 6 there is as little as 1% difference of mass between both the molecules. This feature helped in bringing about the immense concentration of the isotope that was less common. More than 60 kilograms of extremely enriched Uranium was used in the bomb which led to the complete destruction of 90% of the entire city of Hiroshima.

On the other hand, the second atomic bomb that was dropped on Nagasaki (Thursday, August 9, 1945) was called the Fat Man. This one was made from 8 kilograms of plutonium-239 (>90% Pu-239). Moreover the preparation of this bomb involved the systematic operation of certain special kinds of nuclear reactors. The first man made reactor from the University of Chicago was employed that used extremely pure quality of graphite to pace down the neutrons released during fission to result in more fission. When the plutonium-239 was generated in this way it allowed a much simpler process of chemical reaction without involving the complicated isotope separation technique. The effect on Nagasaki was that 22,000 people out of a total population of 174,000 died on the day followed with another 17,000 deaths in the coming four months.

The design of the Little Boy which was made of enriched Uranium was much simpler. The design of the Fat Man which was made of Plutonium was much more complex.

Summary:
1.The Hiroshima atomic bomb Little Boy was made of highly enriched Uranium- 235 while the Nagasaki atomic bomb Fat Man was made of plutonium.
2.The former bomb had a much simpler chemical design while the later was much more complex.


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3 Comments

  1. Person what wrote article not English speaker native obvious. Full of constructions strange grammatical. Thus not could through it get.

    • Yeah it is difficult for lecturers(english).science students find it easy especially from INDIA TAMIL NADU
      THANJAVUR 613004.

  2. Very good technical article.

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