Interpretation of Bremsstrahlung diagram

[rwooduk]

This is what we have been given in class:

I'm a little confused as the electron seems to emit two gamma rays? I understand that the process can't occur if there isn't interaction with a nucleus due to conservation of momentum. Please could someone confirm that the top gamma is the initial release due to deceleration / acceleration, and the lower gamma is there to satisfy conservation laws.

Thanks for any help.

 

[Orodruin]

I'm a little confused as the electron seems to emit two gamma rays?

Why do you think the electron is emitting two gammas? One of the photons in the diagram is an internal line.

 

[rwooduk]

Why do you think the electron is emitting two gammas? One of the photons in the diagram is an internal line.

Thanks. But internal in what sense?

 

[mfb]

Both ends are within the Feynman diagram, it does not leave/enter it => it does not get emitted.

 

[rwooduk]

Both ends are within the Feynman diagram, it does not leave/enter it => it does not get emitted.

I didnt know that, many thanks!