College Physics (7th Edition)

Published by Pearson
ISBN 10: 0-32160-183-1
ISBN 13: 978-0-32160-183-4

Chapter 29 - The Nucleus - Learning Path Questions and Exercises - Conceptual Questions - Page 996: 25

Answer

The detectors need to be accurate to measure the gamma ray energy of 0.511 MeV. Also, the two photons arrive in coincidence exactly. The detectors need to be able to identify both photons as originating from the same annihilation event.

Work Step by Step

The detectors need to be accurate to measure the gamma ray energy of 0.511 MeV. Also, the two photons arrive in coincidence exactly. The detectors need to be able to identify both photons as originating from the same annihilation event.
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