Thread: Pair production
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Bob S
Apr29-09, 06:40 PM
P: 4,663
Pair production

Pair production requires BOTH the photon energy exceeding 1.02 MeV, AND something momentum can be transferred to, like a nucleus. The cross section is proportional to Z2 Ln(E) from 3 MeV to over 1 GeV. (E = hv)