The Manhattan Project: a very brief introduction to the physics of nuclear weapons 9781681746050, 9781681746043, 9781681746074, 1681746050, 1681746077

The development of nuclear weapons by the Manhattan Project during World War II was one of the most dramatic scientific/

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The Manhattan Project: a very brief introduction to the physics of nuclear weapons 9781681746050, 9781681746043, 9781681746074, 1681746050, 1681746077

Table of contents :
Preface --
1. The background --
1.1. The physics --
1.2. The Manhattan Project 2. Nuclear fission --
2.1. Energy release in fission --
2.2. Chain reaction timescale --
2.3. Temperature equivalent of fission fragments --
2.4. A first glimpse of the efficiency issue --
2.5. Neutron pairing energy, the fission barrier, and plutonium --
2.6. Decay mechanisms and the ([alpha], n) problem --
2.7. Spontaneous fission 3. Criticality and efficiency --
3.1. Bare criticality --
3.2. Supercriticality and the radius-density effect --
3.3. Tamped criticality --
3.4. Efficiency 4. Obtaining fissile material --
4.1. U-235 : the electromagnetic method --
4.2. U-235 : the gaseous diffusion method --
4.3. Pu-239 : the Hanford reactors 5. Los Alamos, Little Boy, Fat Man, Trinity, Hiroshima and Nagasaki --
5.1. Predetonation probability --
5.2. Little Boy --
5.3. Implosion and Fat Man --
5.4. Yield probability --
5.5. Trinity --
5.6. Hiroshima and Nagasaki 6. Effects of nuclear weapons --
6.1. Brightness and thermal radiation --
6.2. Shock wave --
6.3. Neutron scattering --
6.4. A brief tutorial on radioactivity and radiation exposure units --
6.5. Prompt radioactivity from a nuclear weapon 7. Legacy --
7.1. Postwar proliferation, tests, and deployments --
7.2. Nuclear arms treaties and the baggage of the Cold War --
7.3. Final thoughts.

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