[Gate-users] x-ray spectrum from linac phase space file

[Stathis Kamperis]

Hi everyone,

this isn't entirely on-topic so I apologise in advance.

The energy spectrum for photons as calculated from the phase space
files found in here[1] has a peak somewhere near 500KeV[2]. The
characteristic x-rays on the other hand for tungsten fall roughly in
the range 60-70 KeV.

Does anyone have any idea why the peak is so off ? Or perhaps it
represents something entirely different ?

Thank you for your consideration.

Best regards,
Stathis

[1] https://www-nds.iaea.org/phsp/photon/ELEKTA_Precise_6MV/
[2] http://dl.dropboxusercontent.com/u/25202446/photon-spectrum.png