Minimum energy required for pair production is:
Correct answer: C. l.02 MeV
- A. 939 MeV
- B. 942 MeV
- C. l.02 MeV
- D. 0.511 MeV
Explanation
''1.02 MeV''Because an electron has a rest mass equivalent to 0.511 MeV of energy, a minimum gamma-energy of 1.02 MeV is required for this pair production. Any excess energy of the pair-producing gamma-ray is given to the electron-positron pair as kinetic energy.
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