[Gate-users] Combining Scintillation and fluorescence of a single material

Wed Apr 13 13:48:29 CEST 2022

Dear users, 

Is there a way to perform both scintillation and fluorescence of a given material ? 
In Material.xml file, I added all the SCINTILLATION... items and the behavior is OK with ionizing photons. Then, I added the required WLS components to check fluorescence but that does not produce anything despite activating the correct physics processes : 

<material name="Terbium"> 
<propertiestable> 
<property name="SCINTILLATIONYIELD" value="4398" unit="1/MeV"/> 
<property name="RESOLUTIONSCALE" value="3.19"/> 
<property name="SCINTILLATIONTIMECONSTANT1" value="890" unit="us"/> 
<property name="SCINTILLATIONYIELD1" value="1"/> 
<propertyvector name="SCINTILLATIONCOMPONENT1" energyunit="eV"> 
<ve energy="2.6" value="0.0"/> 
<ve energy="2.55" value="0.28"/> 
<ve energy="2.5" value="0.0"/> 
<ve energy="2.3" value="0.0"/> 
<ve energy="2.27" value="0.52"/> 
<ve energy="2.24" value="0.0"/> 
<ve energy="2.16" value="0.0"/> 
<ve energy="2.13" value="0.13"/> 
<ve energy="2.1" value="0.0"/> 
<ve energy="2.02" value="0.0"/> 
<ve energy="1.99" value="0.07"/> 
<ve energy="1.95" value="0.0"/> 
</propertyvector> 
<propertyvector name="WLSABSLENGTH" unit="um" energyunit="eV"> 
<ve energy="3.2" value="50000.0"/> 
<ve energy="3.31" value="0.0001"/> 
<ve energy="3.4" value="50000.0"/> 
</propertyvector> 
<propertyvector name="WLSCOMPONENT" energyunit="eV"> 
<ve energy="2.6" value="0.0"/> 
<ve energy="2.55" value="28.0"/> 
<ve energy="2.5" value="0.0"/> 
<ve energy="2.3" value="0.0"/> 
<ve energy="2.27" value="52.0"/> 
<ve energy="2.24" value="0.0"/> 
<ve energy="2.16" value="0.0"/> 
<ve energy="2.13" value="13.0"/> 
<ve energy="2.1" value="0.0"/> 
<ve energy="2.02" value="0.0"/> 
<ve energy="1.99" value="7.0"/> 
<ve energy="1.95" value="0.0"/> 
</propertyvector> 
<propertyvector name="RINDEX" energyunit="eV"> 
<ve energy="1.84" value="1.82"/> 
<ve energy="4.08" value="1.82"/> 
</propertyvector> 
<property name="WLSTIMECONSTANT" value="890" unit="us"/> 
</propertiestable> 
</material> 

Here is the physics list in Gate: 

gate/physics/addProcess Scintillation 
#/gate/physics/addProcess OpticalAbsorption 
#/gate/physics/addProcess OpticalRayleigh 
#/gate/physics/addProcess OpticalBoundary 
#/gate/physics/addProcess OpticalMie 
/gate/physics/addProcess OpticalWLS 

Last point: has somebody tried to perform FRET energy transfer to fluorescent acceptor ? 

Thanks for all. 
Cheers 

Joël Daouk 

Responsable irradiations précliniques 
CRAN - site Médecine 
Université de Lorraine - CNRS - UMR7039 
9, avenue de la forêt de Haye 
Vandoeuvre Cedex, France 54516 

----- Le 13 Avr 22, à 12:00, gate-users-request <gate-users-request at lists.opengatecollaboration.org> a écrit : 

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> 1. Fwd: Fwd: Defining local efficiencies (Wojciech Krzemien)

> ----------------------------------------------------------------------

> Message: 1
> Date: Wed, 13 Apr 2022 11:21:16 +0200
> From: Wojciech Krzemien <wojciech.krzemien at ncbj.gov.pl>
> To: <gate-users at lists.opengatecollaboration.org>
> Subject: [Gate-users] Fwd: Fwd: Defining local efficiencies
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> Dear Gate users,
> I am forwarding the mail of my colleague who encountered some technical
> issues with the GATE forum.
> Any advises will be appreciated. Thank you in advance.

> --
> Best regards,
> Wojtek

> -------- Forwarded Message --------
> Subject: Defining local efficiencies
> Date: Mon, 4 Apr 2022 10:17:23 +0200
> From: Aurélien Coussat <aurelien.coussat at uj.edu.pl>
> To: gate-users at lists.opengatecollaboration.org

> Dear GATE users,

> I am trying to define local efficiencies as described in the
> documentation in section 3.2.17
> (https://opengate.readthedocs.io/en/latest/digitizer_and_detector_modeling.html#local-efficiency).
> To do so, I copied the first example provided by the documentation in my
> simulation. However, I do not understand how the file eff_per_block.dat
> must be formatted, and I could not find an example anywhere.

> Does anyone have such a file that could serve as an example, or knows
> how it should be formatted? I tried to look at the source code, but did
> not really manage to make sense out of it.

> Thank you very much!

> Best regards,

> Aurélien.

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