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Question QMD clustering 

Forum: Hadronic Processes
Date: 18 Jul, 2012
From: George Dedes <George Dedes>

Hi all,

I've been using for quite some time now the QMD model in medical application 
mainly carbon beam in water or PMMA) and I have the following question:

Looking at the literature of different QMD flavors as well as the JAERI QMD 
implemented in GEANT4, I noticed that the stand alone codes do not refer to the 
clustering distance used in GEANT4 (Geant4/processes/hadronic/models/qmd/src/G4QMDMeanField.cc). 
This is by default set to 4fm. So my question is, how the default value was 
selected? This seems to influence the secondaries of the reaction and also the 
gammas that I am personally interested in. 

Why not using a lower clustering distance one or a much higher and let a big 
composite nucleus be handled by the deexcitation for example? So was the 
clustering criterion benchmarked with some data?

Thanks in advance for the answer,
George

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1 None: Re: QMD clustering   (George Dedes - 10 Sep, 2012)
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