Calculating Activity of proton beam

AI Thread Summary
To calculate the activity produced by bombarding a natural lithium target with a proton beam, the initial parameters include a target thickness of 3.8 mg cm-2 and a proton beam of 125 µA at 3.5 MeV. The reaction involved is 7Li(p,n) with a cross-section of 300 mb. The number of protons bombarding the target over 15 minutes is calculated to be approximately 7.022 x 10^17 protons. The discussion highlights the need to convert area density to atomic density and determine the linear attenuation coefficient for accurate calculations. The activation equation is suggested for use, but clarification on flux and unit conversions is needed for further progress.
wormhole228
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Homework Statement


A natural lithium target 3.8 mg cm-2
thick is bombarded with a
125 µA beam of 3.5 MeV protons initiating a 7Li(p,n) reaction.
Assuming a reaction cross section of 300 mb, calculate the
activity produced by a 15 minute bombardment.


Homework Equations


λN=\phi\sigmaNT(1-e-λt)
I=I0e-μx

The Attempt at a Solution


125μA=125μC/s(1 proton/1.602*10-19C)(15*60s)=7.022*1017 protons. I'm not really sure where I would go from here. I got μ/\rho=0.0258 cm2/g. Yet, I can't find the actual linear attenuation coefficent. I figured we would use the activation equation, but I'm not sure on the flux, and the other units.
 
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