Which electrons contributed in compton scattering

  • Thread starter Taghi
  • Start date

Taghi

Hello all,

Can anyone explain to me which electrons contribute in compton scattering?

-Only free electrons;
-Free electrons and weakly bounded to atoms;
-All atomic electrons and free electrons

According to Klein-Nishina formula, photons scatter with all atomic electrons; becouse the cross-section is proportional to Z. But in some books define Compton scattering with only free or weakly bounded electrons. What is true?

Please send me your idea.

Thanks

Taghi Bayat
 

jcsd

Science Advisor
Gold Member
2,085
11
Yes, the Compton effect does work with bound electrons but only because the photon energy is much greater than the binding energy between the electron and the solid, so the electron is knocked clean out of the solid.
 

mathman

Science Advisor
7,688
389
The free electron formula is valid for high energy photons (e.g. gamma rays of the order of 1 Mev or more). When you deal with lower energies, the binding effect is evident and the K-N formula has to be modified.
 

Related Threads for: Which electrons contributed in compton scattering

  • Posted
Replies
8
Views
2K
  • Posted
Replies
10
Views
3K
  • Posted
Replies
1
Views
2K
  • Posted
Replies
7
Views
1K
Replies
4
Views
920
Replies
4
Views
1K
Replies
44
Views
10K

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top