Why does an alpha particle have 40mm range in air?

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SUMMARY

An alpha particle, which is a helium nucleus, has a range of approximately 40mm in air due to its larger size and double positive charge compared to beta particles. This size leads to increased collision frequency with air molecules, resulting in rapid momentum transfer. The slower speed of alpha particles further contributes to their high interaction rate with charged particles, ultimately causing them to lose energy quickly and cease to exist as radiating particles when they capture stray electrons to form stable helium atoms.

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  • Understanding of alpha particle properties and behavior
  • Basic knowledge of atomic structure and nuclear physics
  • Familiarity with particle interactions in gases
  • Knowledge of energy transfer mechanisms in radiation
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  • Research the equations governing alpha particle energy loss in matter
  • Explore the differences in interaction rates between alpha, beta, and neutron particles
  • Study the process of ionization and energy transfer in gases
  • Learn about the stability of helium atoms and the formation of ions
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Students of nuclear physics, researchers in radiation safety, and anyone interested in the fundamental properties of alpha particles and their interactions with matter.

Dixanadu
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Hey everyone...

so I understand that an alpha particle, being a helium nucleus, is quite a large particle compared to, for example, a beta particle. Due to this, it will encounter a lot more collisions and impart its momentum to other particles of air at a much more rapid rate.

Is there anything I'm missing here at a simple level? perhaps any equations that this is due to?
 
Physics news on Phys.org
very simply ...

the alpha particle will easily take a couple of stray electrons and become a stable Helium atom and thereby ceasing to exist as a radiating particleDave
 

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