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Question problems on boundaries 

Keywords: boundary
Forum: Event and Track Management
Date: 11 Feb, 2008
From: giuseppe <giuseppe>

Hi,

I'm considering a 250 MeV proton beam in a detector composed of
a polystyrene layer (thickness of 1 mm),
a MS20 tissue layer (thickness of 6 micron) and
a water layer (thickness of 1 mm).
Iím using

tracking/verbose 1
/testem/phys/addPhysics  standard		#em physics
PhysicsList::AddPhysicsList: <standard>
/testem/phys/addPhysics  binary 		#hadronic physics
PhysicsList::AddPhysicsList: <binary>
/testem/phys/addPhysics  binary_ion		#hadronic physics
PhysicsList::AddPhysicsList: <binary_ion>
/testem/phys/addPhysics  elastic		#hadronic physics
PhysicsList::AddPhysicsList: <elastic>
PhysicsList::SetCuts:CutLength : 10 nm

When I store and save the information about the number
of secondary electrons with energy equal to 0 lying on the
two interface planes (polystyrene- MS20) and (MS20- water),
I obtain the following result:

Nel(polystyrene- MS20 interface) = 20 * Nel(MS20- water interface)

Why is the number of secondary electrons with energy equal
to 0 on the interface (polystyrene- MS20) about 20 times greater
than the number of secondary electrons with energy equal to 0 on
the interface (MS20- water) ??

Please help me.
 
Thanks a lot. 

Giuseppe

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1 None: Re: problems on boundaries   (Vladimir IVANTCHENKO - 11 Feb, 2008)
1 None: Re: problems on boundaries   (giuseppe - 12 Feb, 2008)
2 None: Re: problems on boundaries   (michel maire - 12 Feb, 2008)
1 None: Re: problems on boundaries   (giuseppe - 12 Feb, 2008)
3 None: Re: problems on boundaries   (giuseppe - 12 Feb, 2008)
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