1.00 * 104 1.00 10 Compton 1.00 * 10-2 1.00 * 10-5 Photoelectric 1.00 * 10-8 1.00 * 10-11 0.001 0.010 0.100 1.000 10.000 100.000 Photon energy (MeV) Relative probability

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The probability of a photon interacting with tissue via the photoelectric effect or the Compton effect depends on the photon energy. Use Fig. to determine the best description of how the photons from the linear accelerator described in the passage interact with a tumor. (a) Via the Compton effect only; (b) mostly via the photoelectric effect until they have lost most of their energy, and then mostly via the Compton effect; (c) mostly via the Compton effect until they have lost most of their energy, and then mostly via the photoelectric effect; (d) via the Compton effect and the photoelectric effect equally.

1.00 * 104
1.00
10
Compton
1.00 * 10-2
1.00
* 10-5
Photoelectric
1.00 *
10-8
1.00 * 10-11
0.001
0.010
0.100
1.000
10.000
100.000
Photon energy (MeV)
Relative probability
Transcribed Image Text:1.00 * 104 1.00 10 Compton 1.00 * 10-2 1.00 * 10-5 Photoelectric 1.00 * 10-8 1.00 * 10-11 0.001 0.010 0.100 1.000 10.000 100.000 Photon energy (MeV) Relative probability
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