[Gate-users] Dose actor calculations

[Nada Fakhoury]

Dear all,

I am experiencing a weird behavior of the dose actor. I am simulating  
a gamma source pointing towards a water volume.

I first tried acquiring a depth dose curve along the central axis, and  
got a distribution that didn't quite measure up to what I expected.  
(dose increasing with depth)

See here:  
https://www.dropbox.com/s/hd6da9lhapn5cju/Screenshot%20from%202014-10-11%2017%3A40%3A14.png?dl=0


When I then changed my actor's resolution to get a dose profile in  
various depths in the volume, the distribution in depth was the  
complete opposite of what the depth dose curve at first indicated.  
(dose decreasing with depth)

See here: https://www.dropbox.com/s/e3610h1fhz5r8e6/profiles.png?dl=0

The setup is the same in both cases, the *only* thing that changed was  
the actor's resolution and for the profiles the actor's position. (For  
the central axis depth dose distribution the actor was attached at the  
top of the volume.)


Does anyone have an idea of what may be wrong?

Thank you in advance,

Nada,


**Please ignore the dose values in the graphs, they were acquired with  
different primary events and energies, but the overall behavior  
remains the same in every case. The graphs are drafts.**