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## Homework Statement

Ok, I'm given a formula for the cross section of the scattering and I've been told that the detector is a column of water of depth 10m. I need to find the probability of the scattering within the detector.

## Homework Equations

σ = E(in MeV) x 1.5x10

^{-44}cm

^{2}

## The Attempt at a Solution

I know the cross section is actually a probability in particle physics, but I just don't see how to use the depth of the detector.

A ratio, maybe?