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None Re: optical photon self-absorption in scintillator 

Keywords: optical photon wavelength shift
Forum: Processes Involving Optical Photons
Date: 18 Oct, 2006
From: Benton Pahlka <Benton Pahlka>

Thanks Peter,

I found that I could not get rid of all the warnings entirely despite ensuring that all my arrays were the same length. I am confident that the data values are ok.

I see no real problems in the results and I checked the results for a few different setups and they are all consistent. I'll report back if I find any flaws.

I found for large scintillators (several cm on a side) that the absorption and re-emission process (as a function of wavelength) plays a major role in the number of photons counted.

For plastic scintillators with PPT and POPOP, one needs the wavelength dependent absorption, emission, wls-absorption, and wls-emission spectra. Preferably the PPT and POPOP concentrations as well.

One should be able to add all these parameters in your scintillator material properties table. Mine seems to be working.

A final note: Since the absorption and re-emission probability is not always unity (not every photon is re-emitted) it could be nice to add in an "EFFICIENCY" tag or something similar to G4OpWLS to account for this.

Cheers,

Benton

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1 Feedback: Re: optical photon self-absorption in scintillator   (Peter Gumplinger - 20 Oct, 2006)
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