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Question Solving Discrepancies between Scintillation by/not by particle type 

Forum: Processes Involving Optical Photons
Date: 17 Jun, 2013
From: Andrew Hanson <Andrew Hanson>

I have been working on simulating a scintillator for incoming neutrons/gammas over the past few weeks and in the past few days, have been trying to convert from a standard scintillation yield to a scintillation yield by particle type and energy for higher accuracy. As a preliminary test to make sure I was using it properly, I tried to recreate the original by setting a linear energy relation to photon yield for all the particles that arose from the neutron interaction so that all the created particles should have the same exact photons created/energy loss as the original setup:

>Original: scint.cc
>   optical->SetScintillationByParticleType(false);
>Original: ScintDetectorConstruction.cc
>   NE213_mt->AddConstProperty("SCINTILLATIONYIELD",1./keV);

>Altered: scint.cc
>   optical->SetScintillationByParticleType(true);
>Altered: ScintDetectorConstruction.cc
>    // NE213_mt->AddConstProperty("SCINTILLATIONYIELD",1./keV);	
>    G4double energies[2] = {1.0*keV, 1.0*MeV};
>    G4double yield[2] = {1., 1000.};
>    NE213_mt->AddProperty("ELECTRONSCINTILLATIONYIELD", energies, yield, 2);
>    NE213_mt->AddProperty("CARBONSCINTILLATIONYIELD", energies, yield, 2);
>    NE213_mt->AddProperty("PROTONSCINTILLATIONYIELD", energies, yield, 2);

However, between these two, there is a large discrepancy between the Energy deposition and amount of photons created with the ByParticleType(true) yielding an actual amount of about 0.6 photons/keV secondary particle energy deposition and ByParticleType(false) yielding about 0.3 photons/keV.

This is my first major project, so if anything else would be of use, please let me know though it may look messy or hacked together.

Thank you, Andrew Hanson

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1 Question: Re: Solving Discrepancies between Scintillation by/not by particle type   (Zach Hartwig - 17 Jun, 2013)
1 Feedback: Re: Solving Discrepancies between Scintillation by/not by particle type   (Gumplinger Peter - 17 Jun, 2013)
2 Ok: Re: Solving Discrepancies between Scintillation by/not by particle type   (Andrew Hanson - 18 Jun, 2013)
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