Hiroshima and Nagasaki

Hiroshima and Nagasaki

By Jenny, Jessica and Susannah

3 Big Ideas1.Manhattan Project2.Significance of Bombing3.Why?

Code Name: Manhattan Project

• Einstein: Dear President Roosevelt

•  Scientists: o Oppenheimero Bohm o Fermi o Szilard

•  Research: Oak Ridge• 1st test: July 6, 1945

Test Weapons

• "Little boy": Uranium- 235• "Fat man": Plutonium-

239

The atomic bombing

• August 6, 1945: Hiroshima• August 9, 1945: Nagasaki

In response to

•Pearl Harbor•preemptive

attacks

Surrendered

•After radioactive fallout•Hirohito, Emperor

Little Boy• 9,700 pounds• directly killed 194,566,000 people• destructive force 63 Tera-Joules 

Nuclear Fission•  The atom splits•   critical mass- fissionable materials

needed

Fissionable Materials•  start with U-235, U-233, Pu-239• formed isotopes U-235= U-236= Kr-92+ Ba-142•  U-235 + 1 neutron= 2 neutrons + Sr-92 + Xe-140+ Energy

Nuclear Chain Reaction

• Atom bombarded with nucleus • process continues and triples• sustained by neutron

Nuclear Weapon• Primarily use Plutonium, Uranium• USA, United Kingdom, France, China,

Russia N.P.T

Bibliography

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