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The mass attenuation coefficient of 511 keV photons in water is approximately 0.1 cm2/g. 1. What is the probability (in percent) that a PET system would detect a decay occurring at the centre of a 30 cm diameter sphere of water, and 2. would the probability of the same detectors seeing the decay, increase if the decay moved closer to one of the surfaces?

The mass attenuation coefficient of 511 keV photons in water is approximately 0.1 cm2/g. 1. What is the probability (in percent) that a PET system would detect a decay occurring at the centre of a 30 cm diameter sphere of water, and 2. would the probability of the same detectors seeing the decay, increase if the decay moved closer to one of the surfaces?

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
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The mass attenuation coefficient of 511 keV photons in water is approximately 0.1 cm²/g. 1. What is the probability (in percent) that a PET system would detect a decay occurring at the centre of a 30 cm diameter sphere of water, and 2. would the probability of the same detectors seeing the decay, increase if the decay moved closer to one of the surfaces? 5.0 % - Yes 22.3 % - Yes 5.0 % - No 66.7 %-Yes 22.3% - No
Transcribed Image Text:The mass attenuation coefficient of 511 keV photons in water is approximately 0.1 cm²/g. 1. What is the probability (in percent) that a PET system would detect a decay occurring at the centre of a 30 cm diameter sphere of water, and 2. would the probability of the same detectors seeing the decay, increase if the decay moved closer to one of the surfaces? 5.0 % - Yes 22.3 % - Yes 5.0 % - No 66.7 %-Yes 22.3% - No
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