[Gate-users] Problems with X-ray peak

Francois Smekens fsmekens at gmail.com
Thu Aug 28 11:54:36 CEST 2014


Hi Leda,

Yann and David are right. If you want to model atom deexcitation process,
you will have to use the Gate v7.0.
With this version, there is two possibilities:

1. use the physic list builders (atom deexcitation is automatically
activated)
2. use your own physic list and add the following command in your macro
file:

/gate/physics/addAtomDeexcitation

Bests,
François


2014-08-28 9:42 GMT+02:00 David Sarrut <David.Sarrut at creatis.insa-lyon.fr>:

> Hello,
>
> what Gate version ? If >=7.0, please use the physic list builder
> <http://wiki.opengatecollaboration.org/index.php/Users_Guide_V7.0:Setting_up_the_physics#New_physics_list_mechanism> and
> check with G4 documentation what kind of physics you need.
>
> Sincerely,
> David
>
>
> On Wed, Aug 27, 2014 at 3:17 PM, Leda Lorenzon <lorenzon.leda88 at gmail.com>
> wrote:
>
>>
>> Dear all,
>> I’m trying to simulate Infinia Hawkeye SPECT system with LEHR collimator
>> but I can't obtain, in the simulated spectra, the X-ray peak of lead that I
>> observe experimentally.
>> Here is associated script that I used for the physics processes.
>>
>> /gate/physics/addProcess PhotoElectric
>> /gate/physics/processes/PhotoElectric/setModel LivermoreModel
>> /gate/physics/addProcess Compton
>> /gate/physics/processes/Compton/setModel PenelopeModel
>> /gate/physics/addProcess RayleighScattering
>> /gate/physics/processes/RayleighScattering/setModel PenelopeModel
>> /gate/physics/addProcess ElectronIonisation
>> /gate/physics/processes/ElectronIonisation/setModel StandardModel e-
>>
>> /gate/physics/addProcess Bremsstrahlung
>> /gate/physics/processes/Bremsstrahlung/setModel StandardModel e-
>>
>> /gate/physics/addProcess eMultipleScattering
>> /gate/physics/processes/eMultipleScattering/setModel Urban95Model e-
>>
>> /gate/physics/processList Enabled
>> /gate/physics/processList Initialized
>>
>> /gate/physics/Electron/SetCutInRegion   SPECThead 0.001 cm
>> /gate/physics/Electron/SetCutInRegion   SecondHead 0.001 cm
>> /gate/physics/Gamma/SetCutInRegion   SPECThead 0.001 cm
>> /gate/physics/Gamma/SetCutInRegion   SecondHead 0.001 cm
>>
>>
>> Is there any problem with my script?
>>
>> Please help me.
>>
>> Really thank you.
>>  Leda
>>
>>
>>
>>
>> _______________________________________________
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>> Gate-users at lists.opengatecollaboration.org
>> http://lists.opengatecollaboration.org/mailman/listinfo/gate-users
>>
>
>
>
> --
> David Sarrut, Phd
> Directeur de recherche CNRS
> CREATIS, UMR CNRS 5220, Inserm U 1044
> Centre de lutte contre le cancer Léon Bérard
> 28 rue Laënnec, 69373 Lyon cedex 08
> Tel : 04 78 78 51 51 / 06 74 72 05 42
> http://www.creatis.insa-lyon.fr/~dsarrut
> _________________________________
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