Collisions of electrons and alpha particles

AI Thread Summary
Firing electrons at a solid mass of alpha particles would likely result in the production of helium gas, as alpha particles are the nuclei of helium atoms. However, creating a solid mass of alpha particles or helium is practically impossible under normal conditions. The discussion emphasizes the extraordinary conditions required to achieve such a state. Overall, the interaction between electrons and alpha particles leads to interesting theoretical outcomes, but practical implementation remains highly challenging. The feasibility of this scenario is limited by the nature of alpha particles and the conditions needed to stabilize them.
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What would happen if one were to fire electrons at a solid mass of alpha particles?
 
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How would you propose to construct a solid mass of alpha particles?
 
Well, alpha particles are the nuclei of normal helium atoms, so under reasonable conditions if an electron is fired at alpha particles you're going to get some helium gas.

Though as speedybob said, you can't have a solid mass of alpha particles, or helium, without extraordinary conditions, if ever.
 
Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

So here is the motional EMF formula. Now I understand the standard Faraday paradox that an axis symmetric field source (like a speaker motor ring magnet) has a magnetic field that is frame invariant under rotation around axis of symmetry. The field is static whether you rotate the magnet or not. So far so good. What puzzles me is this , there is a term average magnetic flux or "azimuthal mean" , this term describes the average magnetic field through the area swept by the rotating Faraday...
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