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None Re: range cut for very thin layers 

Forum: Physics List
Re: None range cut for very thin layers (ahmet ayan)
Re: None Re: range cut for very thin layers (Vladimir IVANTCHENKO )
Re: None Re: range cut for very thin layers (Ahmet Ayan)
Date: 17 Apr, 2006
From: michel maire <michel maire>

User Ahmet Ayan wrote:

>> hello, The incident gamma energy is 140keV. We do not expect to see more
>> than 2-3% difference for the effect of the attenuation.
>> 
>> I guess now I will try to verify that the G4 simulation agrees with
>> theory for infinite attenuation for the absorber plates, (i.e., pure
>> geometric comparison).
>> 
>> I modified my SteppingAction as following:
>> -----------------------------------------------
>>   G4String thisVolume = aStep->GetTrack()->GetVolume()->GetName() ;
>>    if(thisVolume == "physiSlit0" ||
>>       thisVolume == "physiSlit1" ||
>>       thisVolume == "physiAbsorber" ) 
>>       aStep->GetTrack()->SetTrackStatus(fStopAndKill);
>> -------------------------------------------------
>> The volumes "physiSlit0", "physiSlit1" and "physiAbsorber" are all
>> made of Pb. 
>> 
>> Am I correct to interpret that the code above would provide infinite
>> attenuation for the volumes made of the Absorber material? Thanks,
>> Ahmet.

  Have a look at examples/extended/electromagnetic/PhotonProcesses
  Here, we evaluate the mean free path and cross section of processes
  in an infinite medium.
  See the README.

                   Michel

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1 None: Re: range cut for very thin layers   (Ahmet Ayan - 17 Apr, 2006)
(_ None: Re: range cut for very thin layers   (michel maire - 18 Apr, 2006)
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