- #1

Kara386

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I've been given that in an electromagnetic calorimeter the radiation length of a material consisting of a single nucleus is:

##X_0 = \frac{716.4A}{Z(Z+1)\ln(287/\sqrt{74}}##

Where ##X_0## is in g ##cm^{-2}##. How can it be in those units when everything in that expression is dimensionless? It's possible I'm meant to use density to calculate ##X_0## in the correct units somehow.

Thanks for any help!

##X_0 = \frac{716.4A}{Z(Z+1)\ln(287/\sqrt{74}}##

Where ##X_0## is in g ##cm^{-2}##. How can it be in those units when everything in that expression is dimensionless? It's possible I'm meant to use density to calculate ##X_0## in the correct units somehow.

Thanks for any help!

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