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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=[itex]\phi[/itex][itex]\sigma[/itex]NT(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/[itex]\rho[/itex]=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.