|Message: Re: Bremsstrahlung with 1 micrometer gold plate||Not Logged In (login)|
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On Fri, 12 Jun 2015 14:41:57 GMT, Tracy Sanders wrote:
> I am trying to run a simulation that shoots electrons of 50 keV at a 1 > micrometer thick gold plate of which would produce photons. After the > gold plate there is a beryllium window that is about 130 micrometers > thick. Right now I am using the Livermore Physicslist, but I'm unsure if > this is the best choice. I also don't know what else would be necessary > to do with the physics list besides just setting cut values and using > RegisterPhysics(new G4EmLivermorePhysics). > > With the current simulation I see a few photons being produced (2-5 in a > thousand). I'm wondering if I am missing something to change > Bremsstrahlung using the class inside of Livermore or is it already > being used just by registering the physicslist? >
In attachement, a run of TestEm0 for Gold. As you can see, the bremsstrahlung cross section is ~88 brems per cm, which means ~0.009 brems per um. This is compatible with what you observe.
You can also run TestEm5 with attached macro.
Attachment: http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2015/06/12/14.22-40507-tracy.mac.txt http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2015/06/12/14.22-59982-tracy.out.txt http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2015/06/12/14.22-8150-Em5.mac.txt
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