Controlling Nuclear Fission Geometry

In summary, the question asked if it is possible to know the direction of fission products from U-235, either through experimentation or theoretical simulation. However, it was noted that the fission products will go randomly in any possible direction due to the direction of incoming neutrons and the odd number of nucleons in U-235. Spin was also discussed, but it was concluded that it does not affect the direction of fission products.
  • #1
nadirkazan
1
0
Hi everyone,
I'm an engineer and not a physicist, so forgive me if something sounds stupid.

Question: Is it possible to know, which way products of nuclear fission (u-235) will go?

Imagine a sheet of single (or few) atom layer crystal of U-235, that is irradiated by neutron source from the edge. Is it possible to predict where fission products will go?

Is it better done experimentally or can be done theoretically or through simulation?
 
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  • #2
No, they will go randomly in any possible direction
 
  • #3
Why? There are at least 2 factors that are not centrally symmetrical.
One is the direction of the incoming neutron. And the other... Uranium 235 has odd number of nucleons, so it has to be a fermion. In fact, the spin happens to be 7/2... so even if the neutron happens to have opposite spin (which it would not always have) the result would be at least spin 3.

Wouldn´t the centrifugal force favour the fission products going somewhere along the equator of the U-235 nucleus rather than towards its poles?
 
  • #4
Spin is not a rotation.
There might be some dependence on the spin direction, but as you don't control that spin direction, this does not change the result.
 

What is nuclear fission geometry?

Nuclear fission geometry refers to the shape and arrangement of the nuclear fuel and control rods in a nuclear reactor. It plays a crucial role in controlling the rate of nuclear fission reactions and ensuring the safety and efficiency of the reactor.

Why is it important to control nuclear fission geometry?

Controlling nuclear fission geometry is important because it allows for the precise regulation of the nuclear reactions occurring in the reactor. This ensures that the reactor operates within safe and stable parameters, preventing potential accidents or meltdowns.

How is nuclear fission geometry controlled?

Nuclear fission geometry is controlled through the use of control rods, which are made of materials that can absorb neutrons and slow down or stop the nuclear reactions. By adjusting the position of these control rods, the rate of fission reactions can be controlled.

What are the potential consequences of not controlling nuclear fission geometry?

If nuclear fission geometry is not properly controlled, it can lead to a rapid increase in the rate of nuclear reactions, causing the reactor to overheat and potentially leading to a meltdown. This can result in the release of harmful radiation and pose a significant threat to public health and the environment.

Are there any challenges in controlling nuclear fission geometry?

There can be challenges in controlling nuclear fission geometry, as it requires precise monitoring and adjustments to ensure the reactor operates safely and efficiently. Additionally, factors such as human error or equipment malfunctions can also pose challenges in maintaining proper control over fission geometry.

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