Message: Re: Question about the linearity parameter in LYSO crystal Not Logged In (login)
 Next-in-Thread Next-in-Thread
 Next-in-Forum Next-in-Forum

None Re: Question about the linearity parameter in LYSO crystal 

Forum: Processes Involving Optical Photons
Re: None Question about the linearity parameter in LYSO crystal (Davinder Siwal)
Re: None Re: Question about the linearity parameter in LYSO crystal (Benton Pahlka)
Date: 28 Nov, 2011
From: Davinder Siwal <Davinder Siwal>

Dear Geant4 Experts

I tried to incorporate your suggestions and edit the different energies of optical photons , so now I am providing 7 energy values with 7 refractive indices as

 const G4int nEntries = 7;

  G4double PhotonEnergy[nEntries] ={2.26*eV,2.39*eV, 2.54*eV,
				    2.68*eV, 2.83*eV, 2.94*eV, 3.05*eV}; //actual 2.95eV @420nm

  G4double RefractiveIndex1[nEntries] ={1.833,1.827,1.822, 1.818, 1.813, 1.81, 1.806};

    G4double Absorption1[nEntries] ={20*cm, 20*cm, 20*cm, 20*cm, 20*cm, 20*cm, 20*cm};

I tried to find the Absorption length variation with wavelength in the literature But I hardly find these values instead I input the constant absorption coefficient at different energies. I am actually using Aluminum foil reflector around the crystal and the front surface photons are reflected by housing material which is also Aluminum. The photocathode which I am using is made up of GaAs material with glass as a optical coupler between photocathode and LYSO crystal. I also tired to give the Ad-hoc values of SPECULARLOBE, SPECULARSPIKE, BACKSCATTERCOSNTAT, values . But again I fails to see the centriod shift at edges. Any suggestions will be greatly appreciated.

Inline Depth:
 1 1
 All All
Outline Depth:
 1 1
 2 2
 All All
Add message: (add)

1 None: Re: Question about the linearity parameter in LYSO crystal   (Benton Pahlka - 28 Nov, 2011)
(_ None: Re: Question about the linearity parameter in LYSO crystal   (Davinder Siwal - 05 Dec, 2011)
(_ None: Re: Question about the linearity parameter in LYSO crystal   (Benton Pahlka - 05 Dec, 2011)
(_ None: Re: Question about the linearity parameter in LYSO crystal   (Davinder Siwal - 05 Dec, 2011)
 Add Message Add Message
to: "Re: Question about the linearity parameter in LYSO crystal"

 Subscribe Subscribe

This site runs SLAC HyperNews version 1.11-slac-98, derived from the original HyperNews