340 / 1359
Output factors for large fields using diodes
Shielded Si diodes for compensation
of photon energy dependence.
Scattered (low-
energy) photons
Silicon chip (2.3 g/cm
3
)
0.7
- Plastic
Incident beam direction
Based on figure by Eklund
et al
[6]
describing IBA Dosimetry diodes (EFD/PFD)
In PTW photon diodes
the backscatter shield
is made of steel instead.