[Gate-users] problem in optical photon simulation (Amir Beheshti)

[Mariele Stockhoff]

Dear Amir,

Some hints:
- Start by looking at the Materials.xml file and check if the light output is set as you desire it.
- Then (just for checking the simulation) turn of Compton scattering only allowing 511keV photoelectric interactions
- In the output look for the photons per eventID instead of all photons summed together
- when you have a Compton interaction there will be a new eventID if I remember correctly. Then you need to check the processID as well
- Check your crystal surface settings, those will have a large effect on the detected photons in your setup 

It is difficult to know what went wrong (if something is wrong). If you have more questions feel free to ask!

Best wishes,
Mariele

> On 3 Mar 2021, at 12:00, gate-users-request at lists.opengatecollaboration.org wrote:
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>   1. problem in optical photon simulation (Amir Beheshti)
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> Message: 1
> Date: Tue, 2 Mar 2021 11:33:18 +0000 (UTC)
> From: Amir Beheshti <amir_be2002 at yahoo.com>
> To: "gate-users at lists.opengatecollaboration.org"
> 	<gate-users at lists.opengatecollaboration.org>
> Subject: [Gate-users] problem in optical photon simulation
> Message-ID: <2024579147.833215.1614684798097 at mail.yahoo.com>
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> Dear GATE users,
> 
> I am simulating optical photons in a 4mmX4mmX20mm LSO crystal in GATE 9.0. 
> I have a problem in outputs. I think the amount of scintillation photons is not correct. My source activity is 50 kBq of 511keV gamma and entries in LSO crystal is about 27000 photon. number of optical photon in the crystal is not logical. Would you
> please tell me how do I obtain accurate number of optical photon produced in crystal?
> 
> Thanks a lot
> 
> 
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