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For one of my PhD project I am trying to calculate the minimum energy required to displace a carbon atoms with gamma rays.

Knowing the displacement energy (Ed) for C in diamond (30 -40 eV), I've managed to calculate the minimum energy required using electron with the formula:

Ed=2(E+2mc^2)E/Mc^2

Where E is the energy of the electron beam in KeV, m is the rest mass of the electron and M is the carbon mass.

There is any simple way to calculate the same result for gamma?

Sorry for the stupid question but being a chemist I struggle a bit with this kind of stuff.

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# Gamma-ray atoms displacement

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