K-25 Created 2024-08-14 Updated 2025-07-16
Y-12 electromagnetic separation plant Created 2024-08-14 Updated 2025-07-16
Thermal neutron Created 2024-08-14 Updated 2025-07-16
These are neutrons that have reached the thermal equilibrium according to the Maxwell-Boltzmann distribution after having bounced around many times without undergoing neutron capture.
Good fissile material is material that is able to absorb thermal neutrons and continue the reaction, because that's the type of neutron you end up getting the most of.
Neutron cross section Created 2024-08-14 Updated 2025-07-16
Figure 1.
Uranium-235 neutron cross section as a function of neutron energy
. Source.
Figure 2.
Neutron cross section for various uranium isotopes
. Source.
Figure 3.
Neutron cross section of two isotopes of Boron as a function of neutron speed
. Source.
Gas centrifuge Created 2024-08-14 Updated 2025-07-16
Gaseous diffusion Created 2024-08-14 Updated 2025-07-16
This isotope separation method was the first big successful method, having been used in the Manhattan Project, notably in the K-25 reactor.
This method was superseded by the more efficient gas centrifuges.
Figure 1.
Gaseous diffusion diagram
. Source.
Comptes rendus de l'Académie des Sciences Created 2024-08-14 Updated 2025-07-16
Apparently there were biweekly reports, that were grouped and published biannually on January and July, each one with a sequential tome number.
For example, both Marie Curie's Polonium paper and Marie Curie's Radium paper were published in the second half of 1898 and fell in tome 127.
TODO how to download a PDF from? I can't even turn the pages...
Cobalt-60 Created 2024-08-14 Updated 2025-07-16
Wikimedia project Created 2024-08-14 Updated 2025-07-16
Uranium ore Created 2024-08-14 Updated 2025-07-16
Thorium isotope Created 2024-08-14 Updated 2025-07-16
Radium Girls Created 2024-08-14 Updated 2025-07-16
Plutonium isotope Created 2024-08-14 Updated 2025-07-16
Oxygen compound Created 2024-08-14 Updated 2025-07-16
Fizzle (nuclear explosion) Created 2024-08-14 Updated 2025-07-16
Neutron capture Created 2024-08-14 Updated 2025-07-16
Isotope separation Created 2024-08-14 Updated 2025-07-16
French Academy of Sciences Created 2024-08-14 Updated 2025-07-16
Cobalt isomer Created 2024-08-14 Updated 2025-07-16

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