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Forum: Processes Involving Optical Photons
Re: Question Getting Neutron Scattering in Liquid Scintillator (Lori Rebenitsch)
Re: Feedback Re: Getting Neutron Scattering in Liquid Scintillator (Gumplinger Peter)
Date: 01 Feb, 2012
From: Lori Rebenitsch <Lori Rebenitsch>

> 
> Neutrons have to produce a charge particle before they can be 'seen'.
>

Yes, so I do expect low statistics, but not none.

> 
> How about QGSP_BERT_HP.
> 

QGSP_BERT_HP gave no data.

> 
> Two things are possible, your neutrons have no (or not the right)
> physics attached to them or they simply, within your statistic, don't
> interact in your liquid scintillator.
>

Hm, the liquid scintillator is created with the following:

  LiqScin = new G4Material(name="LiqScin", density=0.86*g/cm3, ncomp=2);
  LiqScin->AddElement(C, natoms=1);
  LiqScin->AddElement(H, natoms=2);

It's then given various properties with

  ScinPT = new G4MaterialPropertiesTable();

  ScinPT->AddProperty( "RINDEX", pMom, rindex, numBins );
  ScinPT->AddProperty( "ABSLENGTH", pMom, absorption, numBins );
  ScinPT->AddProperty( "FASTCOMPONENT", pMom, ScintFast, numBins );
  ScinPT->AddProperty( "SLOWCOMPONENT", pMom, ScintSlow, numBins );

  ScinPT->AddConstProperty("SCINTILLATIONYIELD", effSY/MeV );
  ScinPT->AddConstProperty("RESOLUTIONSCALE",1.0);
  ScinPT->AddConstProperty("FASTTIMECONSTANT", 1.*ns);
  ScinPT->AddConstProperty("SLOWTIMECONSTANT",10.*ns);
  ScinPT->AddConstProperty("YIELDRATIO",1.0);

  LiqScin->SetMaterialPropertiesTable(ScinPT);

Is there a missing property? The Detector Construction file is attached if more info is needed.

Regards, Lori

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2012/02/01/10.01-28331-sbDetectorConstruction.cc

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