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Question What the parameters mean in material properties tables? 

Keywords: optics photon
Forum: Processes Involving Optical Photons
Date: 07 Sep, 2005
From: John Yellek <azeng78@163.com>

hi,when I study the examples\extended\optical\LXe, I don't sure what the mean of these parameters below, can somebody tell me it is right?

  G4double LXe_Energy[LXe_NUMENTRIES]    = { 7.0*eV , 7.07*eV, 7.14*eV };
// they should be optics photon's energy, right?
// another question, how about the emission spectrum is continuous?
  G4double LXe_SCINT[LXe_NUMENTRIES] = { 0.1, 1.0, 0.1 };
// what's these? Are they the relative light output or others?
  G4double LXe_RIND[LXe_NUMENTRIES]  = { 1.59 , 1.57, 1.54 };
//refractive index,right?
  G4double LXe_ABSL[LXe_NUMENTRIES]  = { 35.*cm, 35.*cm, 35.*cm}; 
//absorbed length, just equal to attenuation length?
  LXe_mt = new G4MaterialPropertiesTable();
  LXe_mt->AddProperty("FASTCOMPONENT", LXe_Energy, LXe_SCINT, LXe_NUMENTRIES);
  LXe_mt->AddProperty("SLOWCOMPONENT", LXe_Energy, LXe_SCINT, LXe_NUMENTRIES);
//time component array.
  LXe_mt->AddProperty("RINDEX",LXe_Energy, LXe_RIND,  LXe_NUMENTRIES);
//refractive index array
 LXe_mt->AddProperty("ABSLENGTH",LXe_Energy, LXe_ABSL,  LXe_NUMENTRIES);
//absorbed lenght array.
LXe_mt->AddConstProperty("SCINTILLATIONYIELD",12000./MeV); 
//scintillation yield,just mean that produce 12000. photons per 1 MeV.
  LXe_mt->AddConstProperty("RESOLUTIONSCALE",1.0);			
//is it resolution scale?  Can somebody tell me its definition.
  LXe_mt->AddConstProperty("FASTTIMECONSTANT",20.*ns);		
  LXe_mt->AddConstProperty("SLOWTIMECONSTANT",45.*ns);
//arise time and decay time,right?		
  LXe_mt->AddConstProperty("YIELDRATIO",1.0);	
//energy transfer efficiency?			
  LXe->SetMaterialPropertiesTable(LXe_mt);

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1 Feedback: Re: What the parameters mean in material properties tables?   (Peter Gumplinger - 08 Sep, 2005)
3 None: Re: What the parameters mean in material properties tables?   (Johannes - 17 Aug, 2011)
1 Feedback: Re: What the parameters mean in material properties tables?   (Gumplinger Peter - 18 Aug, 2011)
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