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None Scintillation Time of Creation & YIELDRATIO 

Forum: Processes Involving Optical Photons
Date: 03 May, 2013
From: Nick Calvert <Nick Calvert>

I have been trying to simulate a scintillator with 2 different decay constants, however I appear to be only getting the slow time constant and no photons created with the fast time constant.

I have defined my material as follows:

Scint_MT = new G4MaterialPropertiesTable();

Scint_MT->AddProperty("FASTCOMPONENT", energy, scintspec,num)->SetSpline(true);

Scint_MT->AddProperty("SLOWCOMPONENT", energy, scintspec,num)->SetSpline(true);

Scint_MT->AddConstProperty("SCINTILLATIONYIELD",n/MeV);

Scint_MT->AddConstProperty("RESOLUTIONSCALE",1.0);

Scint_MT->AddConstProperty("FASTTIMECONSTANT",18.7*ns);

Scint_MT->AddConstProperty("SLOWTIMECONSTANT",432.0*ns);

Scint_MT->AddConstProperty("YIELDRATIO",1.0);

Scint_MT->AddProperty("RINDEX",energy, refractiveindex,num)->SetSpline(true);

Scint_MT->AddProperty("ABSLENGTH",energy, abslength,num)->SetSpline(true);

ScintMaterial->SetMaterialPropertiesTable(Scint_MT);

In my tracking action I am histogramming the time of creation of the optical photons. I appear to get the same time histogram regardless of the value for YIELDRATIO. I have attached the histograms

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2013/05/03/03.44-29908-YieldRatio.png

I was wondering why this was happening? Is it because I have specified the same scintillation spectrum for both components?

Many thanks, Nick

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1 Feedback: Re: Scintillation Time of Creation & YIELDRATIO   (Gumplinger Peter - 03 May, 2013)
(_ None: Re: Scintillation Time of Creation & YIELDRATIO   (Nick Calvert - 03 May, 2013)
1 Warning: Re: Scintillation Time of Creation & YIELDRATIO   (Gumplinger Peter - 13 May, 2013)
1 None: Re: Scintillation Time of Creation & YIELDRATIO   (Nick Calvert - 14 May, 2013)
2 None: Re: Scintillation Time of Creation & YIELDRATIO   (Athreya Shankar - 14 May, 2013)
1 Feedback: Re: Scintillation Time of Creation & YIELDRATIO   (Gumplinger Peter - 14 May, 2013)
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