|Message: Re: CsI caloriemeter, an event never ends!||Not Logged In (login)|
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> I'm trying to simulate an CsI caloriemeter wrapped with Al layer. I've > put some boundary properties such as REALINDEX & IMGINDEX of Al on the > skin surface of CsI crystal and using the physic list of LXe example > with some modification. I spent some time to figure out how to make the > reflection take place on a boundary.
If you correctly specified a finite "IMAGINARYRINDEX" (the correct spelling is important!) then optical photons have a probability > 0 of being absorbed; e.g. you specified a theReflectifity < 1 every time they hit your Al skin surface.
> When I try to run an event, it seems all the processes work > fine(Reflection takes place!) but photons are trapped inside the Al > layered box and never die.
So, something is wrong with your specification of the metal surface and you get no absorption at the surface.
> I think the problem with photons that never die is caused by the fact > that I didn't put absorption length property on CsI, but I can't find > any information about that factor on the internet.
Well, this is, but only, part of your problem. CsI has a finite bulk absorption length (but I don't know what it is). You should be able to find it; in the old days such things were in a Physics Handbook.
> And is it possible to gather two or more physics list into one? for > instance, QGSP_BERT + userphysicslist.
There are several ways to combine physics lists. You can use the G4PhysicsListFactory as in:
or go about it like in basic/B2:
Best regards, Peter
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