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Question High Energy Proton Transport 

Forum: DNA/Very Low Energy
Date: 05 Feb, 2015
From: William Donahue <William Donahue>

Hi,

I have a question regarding the transport of protons. For a project i am working on i need some validation data for a proton with 15 MeV energy stopping in in water. I need the full track structure generated so i figured G4DNA was the way to go. I loaded the dnaphysics example up and made modification to the code to make a large water phantom (14x15x10 mm^3), new source position, and output to CSVs.

The problems i am having are the following

1) The proton is not transported until all the energy is lost. In some cases the last process is a charge conversion but there is no hydrogen transport. So it seems like energy is not conserved. a 9 MeV proton should travel about 7 mm but i am getting a distance of 100 um travel

2) Is there any way to incorporate proton elastic collisions in the model? This would be helpful for my project.

Any help would be greatly appreciated.

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