Why is the minimum energy for pair production 2mc^2(1+m/M)?

Subject: Why is the minimum energy for pair production 2mc^2(1+m/M)?

Date: Fri May 28 10:21:48 1999
Posted by Andreas Morbach
Grade level: grad (science) School: University of Mainz
City: Mainz State/Province: No state entered. Country: Germany
Area of science: Physics
ID: 927904908.Ph

Message:


The minimum energy for photons to make pair production near a 
resting nucleus of mass M is Emin=2mc^2*(1+m/M), where m is the 
mass of an electron.
How does one achive this equation? 
With the ansatz s=(E1+E2)^2-(p1+p2)^2 as a conserved quantity one 
probably needs to make further assumptions to solve this 
equation.

I would be really happy to get an answer very soon?

Sincerely,
Andreas Morbach

Re: Why is the minimum energy for pair production 2mc^2(1+m/M)?

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