Fundamentals of Ionizing Radiation Dosimetry: Solutions to the Exercises by Pedro Andreo & David T. Burns & Alan E. Nahum & Jan Seuntjens

Author:Pedro Andreo & David T. Burns & Alan E. Nahum & Jan Seuntjens [Andreo, Pedro]
Language: eng
Format: azw3
ISBN: 9783527811045
Publisher: Wiley
Published: 2017-06-13T16:00:00+00:00

1 Recall that for small angles , and because the distributions are symmetrical, ; likewise, .

2 Strictly, the contribution by should have been included in the track-end term, but this is equal to 0.0073, that is, negligible compared with that of .

3 In our version of the EGSnrc system, we have found a small inconsistency in the silicon density between PEGS4, 2.4 g cm, and the file ICRU ‘silicon.density’, 2.33 g cm; we have corrected both to 2.33 g cm.

Chapter 9

Cavity Theory

1 A boundary region between carbon and aluminium media is traversed by a fluence of at an energy of 12.5 MeV. Ignoring rays and scattering, what is the absorbed dose in the carbon adjacent to the boundary, and what is the dose ratio ?

Answer: 115.0 Gy, 0.947

Solution:

The absorbed dose in carbon is given by

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