Where Can I Find High-Energy Pair Production Differential Cross Sections?

malawi_glenn
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Hi

I am looking for a source which covers a differential crossection for pair production of electrons and positrons due to photons.

\frac{d^2\sigma}{dEd\Omega}

I need it to be valid for high relativistic energies of electrons/positrons and for all angels. I can only find formulas which are valid for small opening angels :(

(Rev. Mod. Phys. 41, 581 - 639 (1969) Pair Production by Photons)

Thank you for your time
 
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:-)
 
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