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Forum: Physics List
Re: Question Creating process name mismatched (Trung Le)
Date: 06 Jun, 2012
From: John Apostolakis <John Apostolakis>

Dear Trung,

You have found a feature of handling of decay at rest: it is handled by the AtRest process of capture - not the usual decay process.

I think that there are technical reasons for this.

Does this behavior cause you any problems - or is it a curiosity ?

Best regards,
John
===================================================
John Apostolakis, SFT (SoFTware) Group, PH Department, CERN
Email:  john.apostolakis@cern.ch       Office Tel:  +41-22-767-7239
------------------------------------------------------------------------------------------

On Jun 5, 2012, at 5:51 PM, Trung Le wrote:

> 
> *** Discussion title: Physics List
> 
> Dear experts,
> 
> I saw this interesting feature during detector simulation and I could
> produce it with examples/novice/ExN02 with minimal modifications.
> Specifically, I changed to the QGSP_BERT physics list and added a user
> tracking action class to print out all tracked particles. For mu- with
> kinetic energy of 0.5 MeV in the center of the detector, I saw that the
> daughter list from the mu- is consistent with a mu- decay, i.e., nu_mu +
> anti_nu_e + e-, but the creating process name
> (track->GetCreatorProcess()->GetProcessName()) is muMinusCaptureAtRest!
> I understand that mu- could decay or get captured depending on where it
> stopped, but the creating process name seems inconsistent with the used
> physics process.
> 
> I also tried turning off the muMinusCaptureAtRest process using
> /process/inactive muMinusCaptureAtRest in the macro, then
> track->GetCreatorProcess()->GetProcessName() correctly gave the process
> name as 'Decay'
> 
> Machine info:
> 
> Debian Squeeze 64-bit on AMD, gcc 4.4.5, GEANT4.9.4.p02
> 
> Regards,
> 
> Trung
> 
> -------------------------------------------------------------
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1 None: Re: Creating process name mismatched   (Tom Roberts - 06 Jun, 2012)
1 Question: Re: Creating process name mismatched   (Trung Le - 06 Jun, 2012)
2 Question: Re: Creating process name mismatched   (Trung Le - 06 Jun, 2012)
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