Can someone help me out with this problem(not homework ofcourse)..(adsbygoogle = window.adsbygoogle || []).push({});

Find the threshold energy of gamma quantum required to form

- an electron-positron pair in the field of a stationary electron;

- a pair of pions of opposite signs in the field of a stationary proton..

Thank you for reading

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Threshold energy problem

**Physics Forums | Science Articles, Homework Help, Discussion**