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Forum: Processes Involving Optical Photons
Re: Question program stops when scintillation occurs :( (Yen-Yung Chang)
Date: 12 Oct, 2012
From: Gumplinger Peter <Gumplinger Peter>

> I want to simulate YSO crystal scintillation using 60 keV gammas
> shooting on it. The gamma always goes several mm into the crystal and
> triggers photoelectric effect. Then the electron may move several
> microns and triggers e-Ionization and scintillation.

Ok, that looks correct.


I have no clue why that would be.

> What I'd expected is that the gamma generates
> scintillation/optical photons on its way traveling through the crystal,

No, a gamma does not deposit energy on its way through the crystal. Only, once it generates a charge particle will there be a signature (scintillation) in your detector.

> not just AtRestDoIt

For low energy photo-electrons the AtRestDoIt of G4Scintillation is called.

> (and there's no optical photon afterward)

Again, don't know why.

> Have been stocked here for a week :( Oh also I can't do
> SetProcessOrderingToLast(CerenkovPross, idxAtRest);

Who told you to do that? Please, follow the examples. What G4 version are we talking about?

> This gives "segmentation fault (core dumped)". I put my
> and in the attachment.

Sorry, but I cannot open Microsoft files. What's wrong with a simple text file?

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1 None: Re: program stops when scintillation occurs :(   (Yen-Yung Chang - 12 Oct, 2012)
(_ Disagree: Re: program stops when scintillation occurs :(   (Gumplinger Peter - 15 Oct, 2012)
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