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Question Re: How to explain energy spectra of emmited photons from a scintillator, in my code? 

Forum: Processes Involving Optical Photons
Re: Question How to explain energy spectra of emmited photons from a scintillator, in my code? (Mehdi Abbasian Motlagh)
Re: Feedback Re: How to explain energy spectra of emmited photons from a scintillator, in my code? (Gumplinger Peter)
Re: Ok Re: How to explain energy spectra of emmited photons from a scintillator, in my code? (Mehdi Abbasian Motlagh)
Re: Question Re: How to explain energy spectra of emmited photons from a scintillator, in my code? (Mehdi Abbasian Motlagh)
Re: Feedback Re: How to explain energy spectra of emmited photons from a scintillator, in my code? (Gumplinger Peter)
Date: 16 May, 2012
From: Mehdi Abbasian Motlagh <Mehdi Abbasian Motlagh>

> Are you saying that:
> "To test how well the program reproduces your spectrum you can histogram the 
> scintillation photon energy the program has sampled."

No; This:

"The user provides the (relataive) strength of the emmission spectrum at a finite number of photon energies. You can pick those out from your continuous spectrum as best and accurate as you can. The program will then numerically integrate this array, normalize it to one, and store it in a new array."

> e.g. that your Curve1 is actually a representation of the scintillation 
> photon energies Geant4 has sampled? 

No;

x (first column in 14.57-42647-11Untitled4.csv) is a representation of wavelengths which the program Engauge Digitizer digitized from 14.57-70070-pic.png or in fact 14.57-44107-Leo-NE102A-spectra.jpg, I should convert them to related energies to replace with

  const G4int nEntries = 32;

  G4double PhotonEnergy[nEntries] =
            { 2.034*eV, 2.068*eV, 2.103*eV, 2.139*eV,
              2.177*eV, 2.216*eV, 2.256*eV, 2.298*eV,
              2.341*eV, 2.386*eV, 2.433*eV, 2.481*eV,
              2.532*eV, 2.585*eV, 2.640*eV, 2.697*eV,
              2.757*eV, 2.820*eV, 2.885*eV, 2.954*eV,
              3.026*eV, 3.102*eV, 3.181*eV, 3.265*eV,
              3.353*eV, 3.446*eV, 3.545*eV, 3.649*eV,
              3.760*eV, 3.877*eV, 4.002*eV, 4.136*eV };

in ExN06DetectorConstruction.cc. Curve1 is representation of intensity of each produced wavelength.

> Sorry, I don't understand your issue
>

Unfortunately my English is not homogeneous: my writing is not as well as my reading!

I change my Question:

At this time, I don't need to know how A toolkit like G4 Understand shape of the original curve; I want to know:

Is "the array x (first column in 14.57-42647-11Untitled4.csv) produced by Engauge Digitizer" enough to (after convert to energies by E=hc/lambda) replace with above array PhotonEnergy[nEntries] for representing released photons by NE102A scintillator?

> The functional shape of the integral will be such that when sampled will more 
> likely produce scintillation photons around that 423nm. 

I think, this sentence is close to the answer of the above question. Is that right?

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1 Feedback: Re: How to explain energy spectra of emmited photons from a scintillator, in my code?   (Gumplinger Peter - 16 May, 2012)
(_ Question: Re: How to explain energy spectra of emmited photons from a scintillator, in my code?   (Mehdi Abbasian Motlagh - 21 May, 2012)
(_ Feedback: Re: How to explain energy spectra of emmited photons from a scintillator, in my code?   (Gumplinger Peter - 22 May, 2012)
(_ Ok: Re: How to explain energy spectra of emmited photons from a scintillator, in my code?   (Mehdi Abbasian Motlagh - 23 May, 2012)
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