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Question Increasing the dose in the presence of high Z !!! help me plese 

Forum: Medical Applications
Date: Jan 24, 06:52
From: Anatoly Baulin <Anatoly Baulin>

I simulate a percentage deep dose (PDD) in water (Co-60 source). Simulating PDD agrees with experimental measurements.

I create a water phantom and put 5 layers in it that contain cisplatin (see the picture of the created material - fig. 3 and 4). And then I measure (Geant4) the dose and measure increase dose in layer contains cisplatin.

But there is a problem, At different concentrations, the dose is the same. (fig 2 - table of dose increase for 0.3 and 300 uMole)

Although it should not be so, the dose should be different We should observe some dependence on the concentration, but we not observe.

What could be the problem or the error of code? can someone come across?

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2019/01/24/06.51-79793-e1.png
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2019/01/24/06.51-93627-e2.png
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2019/01/24/06.51-98980-e3.png
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2019/01/24/06.51-89523-e4.png

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