What causes nuclear fission in a collision between two neutrons?

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SUMMARY

The collision of two neutrons does not result in repulsive forces due to their lack of charge, leading to one neutron passing through the other. However, nuclear fission occurs when a neutron interacts with a nucleus, primarily due to the strong nuclear force, which overcomes the electromagnetic repulsion between protons in the nucleus. The discussion highlights the importance of understanding neutron scattering and its low probability, referencing relevant literature for further exploration.

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What will happen if we collide two neutrons?
As far as I know,since they have no charge, there won't be any repulsive forces. So one neutron will go through the other.:eek:
Is this true? What about nuclear fission? Why does the neutron split the nucleus when there are no forces present?
 
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Neutrons can scatter off each other but the probability is low. I don't think it's ever been accurately measured. My google-fu came up with this paper of interest: Link
 

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