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(101)Gamma frequency? 
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#1
Apr2708, 10:25 PM

P: 30

1. The problem statement, all variables and given/known data
A gamma particle of energy 4.5 MeV is detected as a product of some nuclear reaction (4.5 MeV is 0.72 pJ). What is the frequency of this gamma radiation? 2. Relevant equations ? 3. The attempt at a solution I tried using d=vt because it was the closest formula I could find in my notes that had anything to do with frequency. I assumed v=3x10^8. Of course, the answer was not correct. Could someone point me in the right direction here? I figured out every other problem but this one, and I only have 1 attempt left 


#2
Apr2708, 11:19 PM

HW Helper
P: 2,249

Hi WPCareyDevil,
What is a gamma particle? (For example, an alpha particle is a helium nuclei, a beta particle is an electron or positron.) Once you identify what it is, what is the formula for its energy? (I'm wondering about your choice of d=vt. Is it because of the v? If so, in this equation v is velocity, not frequency.) 


#3
Apr2708, 11:37 PM

P: 30

Well I have done some research and Gamma particles are elctromagnetic radiation (light emission).. E=mc^2 obviously comes to mind, and I could find the mass of the particle, but how does frequency factor in?
I used d=vt because of the t (t^1=frequency). It was a long shot and didnt make sense to me, but it was the closest I could find and every once in a while Ill connect with a shot in the dark on Webassign. 


#4
Apr2708, 11:41 PM

HW Helper
P: 2,249

(101)Gamma frequency?
That's right; gamma particles are electromagnetic radiation, and when we speak of their particlelike nature we speak of photons.
So here you need the expression for the energy of a photon. What do you get? 


#5
Apr2808, 12:08 AM

P: 30

Ah hah! I googled around and found Planck's constant as well as the formula e=hv where v is the frequency. That was something I didnt learn in class at all. Thanks for the help Alphysicist!!!



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