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Betheformula VS SRIM for Uran in Polycarbonate 
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#1
Nov2411, 10:23 AM

P: 1

Hello everybody,
I investigate polycarbonate foils (makrofol) of 90 μm thickness irradiated by Uions with a charge of z= +28 and a specific energy of 11.4MeV/nucleon. My problem is that in the Srim simulations the charge z is not questioned (or needed?), whereas the stopping power (dE/dx) in the Betheformula is proportional to z^2. I compared the dE/dx values of SRIM (srim.org) with the BetheCalculator of Sven Geier (http://www.sgeier.net/tools/bbt.html) and my own Bethecalculations, they all vary. My aim is the Braggcurve, but therefore i would like to have the correct values/description of the stopping power. Im sorry for my bad english. 


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