Physics Athens 2016

Photons interaction with matter

Table illustrating importance of various interactions with energy in H 2 O *

Photon Energy (MeV)

Relative number of interactions (%) t s k

0.01 0.026 0.060 0.150 4.00 10.00 24.00 100.00

95 50 7

5 50 93

0 0 0 0 6

0 0 0 0 0

100 94 77 50 16

23 50 84

* F. Khan, The Physics of Radiotherapy