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Question Scoring Dose 

Forum: Biasing and Scoring
Date: 02 Dec, 2014
From: Ibrahim <Ibrahim>

dear all,

I calculated the dose in a given layer using:

/score/quantity/doseDeposit Dose1

this calculates dose per event. Is it correct?

I calculated also the dose using Stopping powers from NIST.

the difference between the results obtained with Geant4 and NIST is large.


I irradiated a 100 nm thick Copper layer with an electron beam of Ee=300keV and I obtained: Dose: D1=1.408 mrad/event

from NIST stopping power I got: D2=1.754 mrad/event. The relative difference between these two values of the dose is about 24.6 % !! and for 300 nm SiO2 it is 23.6 % !!

Why there is such a large difference between Geant4 and NIST data?

Additional Info:

in my simulation

density of SiO2: 2.5 g/cm3

Copper density is 8.94 g/cm3

PhysicsList: Low energy physics: Livermore model

cut=0.65 um

There is a vacuum in the world volume.

If you need additional info, please let me know.

I kindly welcome your help.


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1 None: Re: Scoring Dose   (Tsukasa Aso - 09 Dec, 2014)
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