Why are beta particles less penetrating than x-rays?

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Homework Help Overview

The discussion revolves around the comparative penetration abilities of beta particles and x-rays, focusing on the interactions of these particles with atomic structures.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore the effects of charge on the behavior of beta particles versus x-rays when interacting with atomic electrons. Questions arise regarding the nature of these interactions and the implications for penetration depth.

Discussion Status

Some participants have offered insights into the attraction of charged beta particles to atoms and the implications of charge on penetration. There is an ongoing exploration of the differences in behavior between charged particles and neutral photons, with no explicit consensus reached.

Contextual Notes

Participants note the importance of considering the charge of beta particles and the energies of x-ray photons in relation to their interactions with matter. There is an acknowledgment of the need to look up specific energy ranges for further understanding.

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Homework Statement


Why are beta particles less penetrating than x-rays?
 
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What will happen when betas approach the cloud of electrons around the atoms of a material?
 
Delphi51 said:
What will happen when betas approach the cloud of electrons around the atoms of a material?

The β particle has a charge. It will be attracted to any molecules or atoms with an opposite charge, causing it to smash into them.

The photons of the x-ray have no charge. They can move further through empty space without hitting anything.
 
It will be attracted to any molecules or atoms with an opposite charge
Approaching electrons only see the outer charges of molecules and atoms. If you consider the sign of the charges involved, you will see that there is no attraction. If they are going fast enough there will be some crashing, though.

The lack of charge does enable the x-rays to make it through materials, too. It would be worth looking up the range of photon energies that atoms and molecules can absorb.
 

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