The codes (EGSnrc, BEAMnrc) are used to simulate 6MV photon beam produced by
Varian ix linear accelerator and different field size (2020, 1010, 44cm2). The
simulation data is stored in a phase space file that contains complete details of the dat
es of
each particle by tracking its path and interactions.
Phase space files were analyzed using BEAMDP code to:
- Obtain energy spectrum, energy flow, distribution of the mean energy and the
angular distribution of the photons and contaminant electrons on surface of water phantom
and 100cm away from linear accelerator head.
- Study effect of field size on distribution of the energy spectrum 6MV.
- Study of change in distribution of mean energy between center and edge of the field
size.
- Calculation the contribution of contaminant electrons within photonic beam at
21%.
This work aims to find the differential scattering cross-section
for X-ray
scattered by aluminum target with angles in intervals in accordance to both
polarization cases ( completely – partly).
In addition, the relative scattered intensity and po
larization degree have been
presented as a function of scattered angles and the extreme values are found for each curve.
