• Support PF! Buy your school textbooks, materials and every day products Here!

Find max E of a photon in Compton Collision

  • Thread starter Tyst
  • Start date
  • #1
26
0

Homework Statement



Find the energy of an x-ray photon that can impart a max energy of 50keV to an electron by compton collision

Homework Equations



∆λ=h/mc(1-cos(theta)) where m = mass of electron
E=hf
(to be honest, not entierly sure if these are all you need, or if you need them... sorry :( )

The Attempt at a Solution



∆λ=2.43*10^-12 (set theta to 90 because i am dealing with a maximum)

corresponding change in f = c/2.43*10^-12 from above
and since E=hf
∆E=510551 eV which is unfortunatly, larger than the E delivered to the electron... so CLEARLY i've stuffed up... I was planning on being able to say that the energy was 50keV + ∆E so i guess i'm on the wrong track... very wrong... any hints would be very greatly appreciated :!!)
 

Answers and Replies

  • #2
Dick
Science Advisor
Homework Helper
26,258
618
You are changing an equation like f-f'=c/lambda-c/lambda' into f-f'=c/(lambda-lambda'). This is WRONG! Right?
 

Related Threads on Find max E of a photon in Compton Collision

  • Last Post
Replies
1
Views
3K
Replies
0
Views
4K
Replies
3
Views
2K
Replies
9
Views
10K
Replies
1
Views
1K
Replies
0
Views
4K
Replies
3
Views
928
Top