A Positron (Or Antielectron)is Made to Stop in a Sample

question 32

Multiple Choice

A positron (or antielectron) is made to stop in a sample of matter.Soon after,how many gamma rays are observed with what energy each?

• A)two,0.511 MeV each
• B)one,0.511 MeV
• C)none
• D)two,13.6 eV each
• E)one,13.6 eV

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