Answer to Question #145977 in Field Theory for Afraid

Question #145977
What is minimum energy of photon required for electron proton pair.
1
Expert's answer
2020-11-25T10:51:55-0500

Solution


According to electron proton pair production theory minimum 1.02 MeV energy is required to produce electron-proton pair through photons.

This can be shown as below

Suppose both produced electron and proton are in rest then using energy conservation

"E_{photon}=m_oc^2+m_oc^2"

For both rest mass energy is

"m_oc^2= 0.51MeV"

So mininum energy become

"2\\times0.51MeV=1.02MeV"


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